| #9069, aired 2024-03-28 | FREE FOR ALL $1000: The "free" type of this refers to an atom or molecule with a loose electron that can destabilize other molecules a free radical |
| #9047, aired 2024-02-27 | WHERE IS THAT? $400: Protons & neutrons: this part of an atom the nucleus |
| #8923, aired 2023-07-26 | PHYSICS $2000: In the early 1900s the "plum pudding" model for the internal structure of these was replaced by the planetary model the atom |
| #8887, aired 2023-06-06 | QUOTABLE NOTABLES $600: A physicist:
"The unleashed power of the atom has changed everything" Einstein |
| #8882, aired 2023-05-30 | SCIENTISTS $1200: Maria Goeppert Mayer shared a Nobel for developing the shell model of this part of an atom made of protons & neutrons a nucleus |
| #8762, aired 2022-12-13 | CHEMISTRY $400: When this gloomy outlook follows "electro", it refers to the ability of an atom to attract electron pairs electronegativity |
| #8760, aired 2022-12-09 | SCIENCE! $600: Let's change the subject & talk about this class of rocks including gneiss & soapstone that gets changed atom by atom over time metamorphic |
| #8717, aired 2022-10-11 | SCIENCE GRAB BAG $1200: Stannous chloride contains 2 atoms of chlorine & one atom of this tin |
| #8679, aired 2022-07-07 | SUCH GREAT CHEMISTRY $2000: The electrons in the outer shell of an atom are called this type of electron, from the Latin for "power" a valence |
| #8670, aired 2022-06-24 | SPIES LIKE THEM $1600: In 1951 electrical engineer Morton Sobell was tried along with this pair in the nation's first atom spy trial the Rosenbergs |
| #8622, aired 2022-04-19 | LET'S GET SCIENTIFIC $400: Lise Meitner, who has an element named for her, was instrumental in the discovery of this splitting of an atom's nucleus fission |
| #8620, aired 2022-04-15 | SCIENTIFIC CANADIAN $1600: Atom bomb builder Louis Slotin was hailed as a hero for shielding others from a fatal burst of radiation at this lab Los Alamos |
| #8596, aired 2022-03-14 | NUCLEAR PHYSICS $1200: The first people to use the term "atom" were the ancient Greeks & in their language, it refers to this quality indivisibility |
| #13, aired 2022-02-17 | HETERONYMS $1000: Joined a group to bargain for them, as the workers did, or without an electrical charge, like an atom unionized ["YOON-yun-ized"] & unionized ["un-EYE-un-ized"] |
| #8547, aired 2022-01-04 | SCIENCE $400: The atomic number of an element is determined by the number of these in one atom of it protons |
| #8530, aired 2021-12-10 | "EX"AM TIME $2000: In physics this principle means no 2 particles in an atom can share the same set of quantum numbers the (Pauli) exclusion principle |
| #8449, aired 2021-07-22 | 3 LETTERS, 2 SYLLABLES $2000: It's an atom with a negative or positive charge an ion |
| #8367, aired 2021-03-30 | SCIENCE CLASS $800: Each atom of this element has only one proton hydrogen |
| #8355, aired 2021-03-12 | LABORATORIES $800: Located near Chicago, a national physics lab bears the name of this Italian who helped develop the atom bomb Fermi |
| #8314, aired 2021-01-14 | LET'S GO TO THE ARCHIVES $2000: The Vassiliev Notebooks of information from Soviet archives show that yes, this NYC-born man executed in 1953 was an atom spy Rosenberg |
| #8151, aired 2020-02-03 | SCIENCE $2,000 (Daily Double): An atom or molecule that has an unpaired electron is called by this "liberated" name & can damage your cells a free radical |
| #2, aired 2020-01-07 | NOT AN ARMCHAIR EXPERT $1000: (Dax Shepard delivers the clue.) Around 1912 this man then working in Manchester, England was the leading expert on nuclear physics; in fact he was the only expert on it, since he'd discovered the atomic nucleus & established the nuclear model of the atom (Ernest) Rutherford |
| #8116, aired 2019-12-16 | GREAT DANES $1600: Niels Bohr said an atom's electro-magnetic radiation occurred only when one of these elem. particles jumped to a lower-energy orbit an electron |
| #8113, aired 2019-12-11 | SCIENCE $800: It's the splitting of the nucleus of an atom into 2 or more nuclei fission |
| #8063, aired 2019-10-02 | RANGER THINGS $1000: This atom spy was listening to the "Lone Ranger" radio show when nabbed by the FBI in 1950; they picked up his wife later (Julius) Rosenberg |
| #8051, aired 2019-09-16 | 200 YEARS OF WALT WHITMAN $800: "Every atom belonging to me as good belongs to you", wrote Walt in this groundbreaking long poem "Song of Myself" |
| #8026, aired 2019-07-01 | "V" IN SCIENCE $2000: The outermost region of an atom where electron transfers occur is called this "shell" the valence |
| #7978, aired 2019-04-24 | SCIENCE CENTRAL $1600: In 1916 the great chemist Gilbert Lewis called the central part of an atom this, a word we use for the seed in an apricot pit the kernel |
| #7950, aired 2019-03-15 | 3-LETTER SCIENCE $600: This type of atom is formed by the loss or gain of electrons an ion |
| #7843, aired 2018-10-17 | NUCLEAR PHYSICS $400: The world's more than 400 nuclear power plants use this process of splitting an atom in 2 to create energy fission |
| #7676, aired 2018-01-15 | SCIENCE WITH IAIN ARMITAGE $800: (Iain Armitage presents the clue.) The way we got this term for a bond between an electron pair is that the electrons in the outermost shell of an atom are called valence electrons covalent |
| #7663, aired 2017-12-27 | THE IMPORTANCE OF BEING ERNEST $2000: This New Zealand-born physicist is seen here around the time he established the nuclear model of the atom Sir Ernest Rutherford |
| #7590, aired 2017-09-15 | CHEMISTRY $2000: The closest electron shell to the nucleus of an atom is designated by this letter of the alphabet a K |
| #7503, aired 2017-04-05 | BEFORE & AFTER $600: The atom bomb partner of Little Boy become a fabric-related term for a clergyman Fat Man of the cloth |
| #7478, aired 2017-03-01 | PLUS "C" $2000: Insert a "C" into this charged atom & get this object of veneration in the Eastern Orthodox church ion and icon |
| #7428, aired 2016-12-21 | ON YOUR SLEEVE $400: On an Army patch for a special 1945 project, a question mark represents secrecy with the tail splitting this the atom |
| #7361, aired 2016-09-19 | SCIENCE CLASS $1600: A hydrogen atom has one of these as its nucleus, with a single electron orbiting it a proton |
| #7316, aired 2016-06-06 | KITCHEN TERMS DEFINED $600: The name of these fatty acids means they have a double bond at the 3rd carbon atom from the end omega-3 |
| #7254, aired 2016-03-10 | TV NETWORK NAMES $800: An electrically charged atom Ion |
| #7227, aired 2016-02-02 | I NEED THE STRONG STUFF $800: These 2 types of particles in an atom's nucleus are bound together by the "strong force" protons and neutrons |
| #7223, aired 2016-01-27 | TECHNOLOGY $600: The first atom bomb using this transuranium element was detonated on July 16, 1945 in New Mexico plutonium |
| #7215, aired 2016-01-15 | THE EARLY 20th CENTURY $200: Using accelerated particles in 1932, John Cockcroft & Ernest Walton became the first to divide one of these an atom |
| #7181, aired 2015-11-30 | PHYSICISTS $1200: Ernest Rutherford found that the volume of an atom was made up mostly of this empty space |
| #7114, aired 2015-07-16 | 20th CENTURY NAMES $400: On Aug. 2, 1939 this scientist wrote to the U.S. president to recommend that atom bombs be made, to his later regret Einstein |
| #7090, aired 2015-06-12 | EASY SCIENCE $400: The N.Y. Times' 1945 Hiroshima story mentioned "scientists' long-held dream of" doing this to "the atom" splitting |
| #6992, aired 2015-01-27 | DISCOVERIES IN THE SCIENCES $800: An elemental unit inside the study of the physical structure of the human body atom (in anatomy) |
| #6980, aired 2015-01-09 | GREEK LETTERS TODAY $200: First things first--this particle can become the nucleus of a helium atom by capturing 2 electrons an alpha particle |
| #6974, aired 2015-01-01 | SCIENCE $400: (Kelly of the Clue Crew shows an atomic animation on the monitor.) Ca, calcium, has two electrons in its outer shell; when they're lost, Ca2+ is formed; it's one of these charged atoms, with the same electronic structure as an argon atom an ion |
| #6929, aired 2014-10-30 | ASTRONOMY $800: The only permanent feature on a comet is this central part, also part of an atom a nucleus |
| #6907, aired 2014-09-30 | ARMS AND THE MAN $1600: It's said that this action star & Total Gym endorser can split the atom...
with his bare hands Chuck Norris |
| #6810, aired 2014-04-04 | SCIENTIST SAYS $2000: "If one has left this entire system to itself for an hour... the cat still lives if meanwhile no atom has decayed" Schrödinger |
| #6784, aired 2014-02-27 | DONE THAT $600: In 1913 Niels Bohr theorized that these move in fixed orbits around an atom's nucleus electrons |
| #6780, aired 2014-02-21 | FIGURING OUT THE UNIVERSE $1600: (Sarah gives the clue from the Sanford Underground Research Facility in South Dakota.) The double-walled titanium cylinder acts as a thermos, so this gas, the "X" in the LUX experiment, stays liquid; scientists hope that some elusive dark matter will bump into an atom of it xenon |
| #6749, aired 2014-01-09 | 2-WORD SCIENCE TERMS $400: (Sarah of the Clue Crew shows an atomic animation on the monitor.) Absorbing a neutron causes fission in one atom, leading to fission in more and more atoms, creating this process that's usually controlled by nuclear reactors chain reaction |
| #6740, aired 2013-12-27 | & ATOM $400: Of the 3 main components of an atom, these are farthest from the nucleus electrons |
| #6740, aired 2013-12-27 | & ATOM $800: Atoms are often measured using these units, whose symbol looks like a capital A with a small circle on the top angstroms |
| #6740, aired 2013-12-27 | & ATOM $1200: IBM scientists have it down to 12 atoms to store each of this unit of information based on 1s & 0s a bit |
| #6740, aired 2013-12-27 | & ATOM $1600: The spontaneous type of this sees an atom's unstable nuclei split into nearly equal fragments fission |
| #6740, aired 2013-12-27 | & ATOM $2000: This "number" in an atom refers to the number of atoms with which a single atom will unite chemically the valence number |
| #6719, aired 2013-11-28 | FEAT $800: In 1943 Norwegian commandos set back the Nazi atom program by destroying a 4-month supply of this liquid heavy water (deuterium oxide) |
| #6711, aired 2013-11-18 | NUCLEAR PHYSICS $400: Ionization energy is the amount of energy required to remove one of these from an atom an electron |
| #6679, aired 2013-10-03 | THE NEUTRON DANCE $2000: Binding its neutrons to its protons, this "force" holds together an atom's nucleus strong |
| #6667, aired 2013-09-17 | I MADE UP YOUR MIND $2000: Felix Hoenikker, father of ice-nine & the atom bomb Kurt Vonnegut Jr. |
| #6566, aired 2013-03-18 | QUASI-RELATED PAIRS $800: Elemental component & overhanging roof edge atom & eave |
| #6522, aired 2013-01-15 | SAME 4 LETTERS, DIFFERENT WORD $600: Electron home & castle protector atom & moat |
| #6480, aired 2012-11-16 | PHYSICISTS $600: (Sarah of the Clue Crew shows an atomic explosion photo and an atomic diagram on the monitor.) Leading to the development of the atomic bomb, an atom of this element was famously split by Otto Hahn in 1938 uranium |
| #6366, aired 2012-04-30 | PHYSICAL SCIENCE $1,500 (Daily Double): In an atom, these particles move in arrangements called orbitals electrons |
| #6295, aired 2012-01-20 | PHYSICS $1200: This particle in an atom's nucleus was discovered free of charge in 1932 a neutron |
| #6273, aired 2011-12-21 | PHYSICAL SCIENCE $1600: In alpha decay a radioactive atom emits 2 protons, making it a new element as this figure drops by 2 atomic number |
| #6253, aired 2011-11-23 | SCIENCE-Y 3-LETTER WORDS $2000: These 2 similarly spelled words mean a span of time longer than an era & an electrically charged atom an eon & an ion |
| #6186, aired 2011-07-04 | IT'S A SMALL WORLD $400: It's the smallest unit into which matter can be divided & still keep the properties of an element an atom |
| #6135, aired 2011-04-22 | SAME FIRST & LAST LETTER $800: The part of an atom's nucleus that fits the category a neutron |
| #5957, aired 2010-07-06 | SCIENCE CLASS $400: 99.95% of the mass of an atom is in this part the nucleus |
| #5934, aired 2010-06-03 | ATOM $200: The first atomic bomb to be dropped in warfare used an isotope of this element as its explosive uranium |
| #5934, aired 2010-06-03 | ATOM $400: Early atomic theorist Democritus said this color results from smooth, flat atoms that cast no shadow white |
| #5934, aired 2010-06-03 | ATOM $600: In a nice, stable early 1900s model, the atom was like a plum pudding with electrons distributed like these raisins |
| #5934, aired 2010-06-03 | ATOM $800 (Daily Double): An atom may become more stable by releasing this Greek letter particle, identical to a helium atom nucleus an alpha particle |
| #5934, aired 2010-06-03 | ATOM $800: The atomic number refers to the number of these in an atom protons |
| #5923, aired 2010-05-19 | GOING GREENER $2,000 (Daily Double): (Kelly of the Clue Crew reports from Sony Pictures Studios.) Some energy on the Sony lot is generated by the sun's photons striking the solar cell surface, making these jump from one atom to the next, creating a chain reaction which can be harnessed electrons |
| #5906, aired 2010-04-26 | NUCLEAR WEAPONS 101 $800: (Kelly of the Clue Crew shows an atomic animation on the monitor.) A neutron is used to split the nucleus of an atom, releasing energy in this type of nuclear bomb process fission |
| #5853, aired 2010-02-10 | SUPERHERO NAMES THROUGH PICTURES $1000: We take you to science class for a representation of this DC Comics hero the Atom |
| #5788, aired 2009-11-11 | ASTRO-QUIZ $200: The body of a comet is called this, just like the center of an atom a nucleus |
| #5783, aired 2009-11-04 | GEEK LOVE $1200: The world's smallest laptops are nicknamed Atom, the name of the processor made by this company Intel |
| #5728, aired 2009-07-01 | STARTS WITH 2 VOWELS $1200: Michael Faraday introduced this term for an electrically charged atom an ion |
| #5710, aired 2009-06-05 | WOMEN IN SCIENCE $400: In 1939 physicist Lise Meitner & her nephew Otto Frisch coined this term referring to the splitting of an atom's nucleus nuclear fission |
| #5700, aired 2009-05-22 | HOW INVENTIVE $900 (Daily Double): Fashion designer Jacques Heim called his smallest style the Atom; rival Louis Reard named his after this atoll Bikini |
| #5697, aired 2009-05-19 | MARCUS $1000: Physicist Sir Marcus Oliphant helped to develop the atom bomb & to discover new forms of these 2 simplest elements hydrogen & helium |
| #5670, aired 2009-04-10 | PLEDGE OF ALLEGIANCE WORDS $3,000 (Daily Double): The meaning of the Greek word "atomos" which gives us "atom" indivisible |
| #5659, aired 2009-03-26 | SCIENCE HISTORY $400: Using the ultramicroscope, Jean Perrin estimated the size of this as one hundred millionth of a centimeter an atom |
| #5638, aired 2009-02-25 | SCIENCE $2000: (Jimmy of the Clue Crew presents the clue.) Carbon, one of the most common elements, has been discovered in 60-atom configurations called these, named for an architect buckyballs (fullerenes) |
| #5625, aired 2009-02-06 | COMPOUNDS $1,000 (Daily Double): Thiols, emitted by skunks & chopped onions, resemble alcohols but with an atom of this element in place of an oxygen atom sulfur |
| #5624, aired 2009-02-05 | BASIC SCIENCE $400: (Sarah of the Clue Crew holds up a sugar cube.) At sea level, at 32 degrees Fahrenheit, 1 cubic centimeter of air, the size of a sugar cube, contains 45 billion billion of these, from the Latin for "little mass" a molecule |
| #5588, aired 2008-12-17 | 3-LETTER WORDS $1200: If you're an atom & you lose or gain an electron, you're one of these an ion |
| #5573, aired 2008-11-26 | NORDIC TRACK $1000: In 1957 this Danish physicist famous for his model of the atom won the first Atoms for Peace award (Niels) Bohr |
| #5500, aired 2008-07-04 | SCIENCE $800: Mass number is defined as the number of neutrons & these particles in an atom's nucleus protons |
| #5475, aired 2008-05-30 | CHEMISTRY $1200: A free radical is an atom or molecule that has an unpaired one of these an electron |
| #5468, aired 2008-05-21 | PHYSICISTS $800: This Italian-born physicist first split the atom in 1934, although he didn't know it for 4 more years Fermi |
| #5461, aired 2008-05-12 | CHEMISTRY $1600: Ionization energy, what's needed to remove 1 electron from 1 atom, is high for this non-reactive 6-element group noble gases |
| #5432, aired 2008-04-01 | SCIENCE STUFF $1600: In this type of bomb, 2 atoms of deuterium collide to produce a helium atom & extra neutrons a hydrogen bomb (or a fusion bomb) |
| #5381, aired 2008-01-21 | 2007 BESTSELLERS $400: This Tibetan, a noted big hitter, hit the list with "The Universe In A Single Atom" the Dalai Lama |
| #5351, aired 2007-12-10 | "Y"? $200: You can split the atom or even do barrel rolls using this toy a yo-yo |
| #5321, aired 2007-10-29 | SCIENCE ADJECTIVES $400: "Atomic" & this word describing the central region of an atom are both found before "power" & "fission" nuclear |
| #5295, aired 2007-09-21 | ARACHNIDS $1,400 (Daily Double): The smallest arachnid at .0003 inches in length, its name is synonymous with a tiny amount a mite |
| #5068, aired 2006-09-27 | LEAPING $2000: When an atom undergoes a quantum leap, one of these light particles is emitted or absorbed a photon |
| #5051, aired 2006-07-24 | "D" IN SCIENCE $2000: About 1 hydrogen atom in 6,500 is this isotope deuterium |
| #5029, aired 2006-06-22 | THE NEW YORK TIMES MOVIE REVIEWS $2000: The spacemen in this 1951 film are so peaceful "you'd hardly expect them to split an infinitive, let alone an atom" The Day the Earth Stood Still |
| #5027, aired 2006-06-20 | CHEMISTRY $1200: These electron energy layers surrounding an atom's nucleus are labeled K, L, M, N, O, etc. shells |
| #5023, aired 2006-06-14 | AN ATOMIC CATEGORY $400: John Dalton figured that in water, an atom of this was 8 times heavier than an atom of hydrogen oxygen |
| #4969, aired 2006-03-30 | THE PERIODIC TABLE OF ELEMENTS $800: (Jon of the Clue Crew shows the periodic table on a monitor.) The columns on the periodic table are of atoms with the same configuration of these as they fill the atom's shell electrons |
| #4955, aired 2006-03-10 | LET'S SPLIT! $600: Otto Hahn & Fritz Strassman got together long enough to split this in 1938 the atom |
| #4954, aired 2006-03-09 | ON ROUTE 66 $1000: As it has an atomic number of 66, the chemical element dysprosium has 66 of these in each atom protons |
| #4909, aired 2006-01-05 | SCIENCE NEWS $2000: Using a single atom to represent one "qubit" is part of the new world called this type of computing quantum |
| #4867, aired 2005-11-08 | MEDICAL PREFIXES & SUFFIXES $400: Schizo-,
as in an atom or a banana dessert split |
| #4841, aired 2005-10-03 | SUBATOMIC MASS PERSUASION $400: It's where you'll find the protons in an atom the nucleus |
| #4841, aired 2005-10-03 | SUBATOMIC MASS PERSUASION $1600: The mass of any 1 proton is about equal to the mass of one atom of this element hydrogen |
| #4812, aired 2005-07-05 | SCIENCE $400: A deuterium atom is a hydrogen atom that has this keeping its proton company in the nucleus a neutron |
| #4784, aired 2005-05-26 | CHEMISTRY $1200: The configuration of these in an atom is usually given for the ground state, not the excited state electrons |
| #4784, aired 2005-05-26 | CHEMISTRY $2000: Number of hydrogen atoms it takes to equal the weight of one carbon atom 12 |
| #4765, aired 2005-04-29 | THAT'S ELEMENT-ARY $1000: One atomic mass unit equals 1/12 the mass of an atom of the most common isotope of this element carbon |
| #4733, aired 2005-03-16 | MAD ABOUT SCIENTISTS $800: In 1924 Louis Victor de Broglie described the wave-like properties of this basic particle of an atom the electron |
| #4703, aired 2005-02-02 | VOCABULARY $800: Differing by a letter, the 2 words meaning an electrically charged atom & a very long time eon & ion |
| #4681, aired 2005-01-03 | PHYSICS $400: Leo Szilard's term for the fission process where 1 neutron breaks an atom in 2, which splits more atoms... a chain reaction |
| #4666, aired 2004-12-13 | MAYBE YOU HAVE TO BE A NUCLEAR PHYSICIST $400: An atom of this No. 2 element has an alpha particle as its nucleus helium |
| #4533, aired 2004-04-28 | JUMP $800: In the Bohr model of the atom, energy is released when one of these jumps to a specified orbit about the nucleus an electron |
| #4517, aired 2004-04-06 | 19th CENTURY SCIENCE $1000: In 1815 William Prout hypothesized that this was the fundamental atom & all other atoms were made of it hydrogen |
| #4501, aired 2004-03-15 | SCIENCE & TECHNOLOGY $600: If an atom loses one of these, it becomes a cation, a positively charged ion electron |
| #4485, aired 2004-02-20 | CHEMISTRY $400: This particle adds to the mass of an atom, but not to the charge a neutron |
| #4472, aired 2004-02-03 | LOSING, LOSING, & MORE LOSING $2000: It's an atom that can become electrically charged by losing one or more electrons ion |
| #4469, aired 2004-01-29 | YOU BETTER KNOW SOME SCIENCE $800: It was an atom of this element that Otto Hahn split in 1938 uranium |
| #4381, aired 2003-09-29 | RUSSIAN GEOGRAPHY $800: The first Soviet atom bomb was produced at the Mayak Complex in this range running from the Arctic to Kazakhstan the Urals |
| #4356, aired 2003-07-07 | THE OTTO CLUB $1200: Otto Hahn & Fritz Strassman discovered this atom-splitting process in 1938 nuclear fission |
| #4321, aired 2003-05-19 | PHYSICAL SCIENCE $1600: In 1925 Wolfgang Pauli stated his exclusion principle -- no 2 of these particles in an atom can be in the same state electrons |
| #4285, aired 2003-03-28 | SHE BLINDED ME WITH SCIENCE $1200: In 1963 Maria Goeppert Mayer received a Nobel Prize in Physics for her "shell model" of this part of an atom Nucleus |
| #4274, aired 2003-03-13 | DON'T SWEAT THE SMALL STUFF $1600: Of the 3 main particles that make up an atom, this one is the smallest by mass electron |
| #4265, aired 2003-02-28 | CHEMISTRY CLASS $400: The largest part of a water molecule is an atom of this element that has a negative charge oxygen |
| #4255, aired 2003-02-14 | NUCLEAR PHYSICS $400: More than 99.9% of an atom's mass is contained within this nucleus |
| #4237, aired 2003-01-21 | FROM THE GREEK $400: The term "atom" comes from the Greek "atomos", meaning this, the word that follows "One Nation, Under God" indivisible |
| #4227, aired 2003-01-07 | UP & ATOM $400: To study atoms you might use a scanning tunneling one of these microscope |
| #4227, aired 2003-01-07 | UP & ATOM $800: In 1932 James Chadwick discovered these non-charged particles neutrons |
| #4227, aired 2003-01-07 | UP & ATOM $1200: Rather than in fixed orbits, these particles travel in shells or layers around the nucleus electrons |
| #4227, aired 2003-01-07 | UP & ATOM $1600: When a nucleus is split, it's called fission; when 2 nuclei combine, it's called this fusion |
| #4227, aired 2003-01-07 | UP & ATOM $2000: No matter what element they are in, they weigh the same & their total is an element's atomic number protons |
| #4191, aired 2002-11-18 | HEY, BABY, I'M PREMED $1000: Organic chem is easy once you get this concept of an atom's combining capacity, also applied to some electrons valence |
| #4103, aired 2002-06-05 | SCIENCE GUYS $1000: This Italian-born physicist first split the atom in 1934, although he didn't know it for 4 more years (Enrico) Fermi |
| #4084, aired 2002-05-09 | CHEMISTRY $1200: It's the valence number of the oxygen atom in a molecule of water 2 |
| #4013, aired 2002-01-30 | SPIES & SPYING $400: During WWII teenage American physicist Theodore Hall passed secrets about this weapon to the USSR atom bomb |
| #3989, aired 2001-12-27 | THE "N" ZONE $1600: It's the central part of an atom, or part of the head of a comet nucleus |
| #3981, aired 2001-12-17 | ATOM $400: The nucleus of an atom contains neutrons & these positively charged particles protons |
| #3981, aired 2001-12-17 | ATOM $800: It's made of specific combinations of atoms; 2 hydrogen atoms bond to 1 oxygen atom to form a water one a molecule |
| #3981, aired 2001-12-17 | ATOM $1200: An ion is an atom that contains a charge as a result of gaining or losing one or more of these an electron |
| #3981, aired 2001-12-17 | ATOM $1,500 (Daily Double): This type of mechanics, a field of physics, deals with the forces inside an atom quantum |
| #3981, aired 2001-12-17 | ATOM $1600: (Hi, I'm Rudy Marcus, Nobel Prize winner in chemistry. Atoms having the same nuclear charge but different masses are called these isotopes |
| #3945, aired 2001-10-26 | PHYSICISTS $600: Georges Lemaitre's idea of the explosion of a primeval atom gave rise to this theory Big Bang Theory |
| #3909, aired 2001-09-06 | UP & ATOM $200: An atom consists of 3 basic types of particles called protons, neutrons & these electrons |
| #3909, aired 2001-09-06 | UP & ATOM $400: An honorary "Atoms for Peace" award went to this ex-U.S. president in 1969, the year of his death Eisenhower |
| #3909, aired 2001-09-06 | UP & ATOM $600: Contrary to popular belief, the 28-year length of this for strontium 90 is not shared by a Twinkie the half-life |
| #3909, aired 2001-09-06 | UP & ATOM $800: Theoretical temperature at which atoms & molecules of a substance have the least possible energy absolute zero |
| #3909, aired 2001-09-06 | UP & ATOM $1000: In 1913, this Danish physicist made the 1st model that incorporated the field of quantum mechanics Niels Bohr |
| #3894, aired 2001-07-05 | PLASTICS $600: This resin whose name means it contains an oxygen atom can set to form a strong adhesive epoxy |
| #3842, aired 2001-04-24 | SUBATOMIC PARTICLES $1,000 (Daily Double): One proton makes up over 99% of the mass of an atom of this element, 2 of which are found in water Hydrogen |
| #3807, aired 2001-03-06 | CHEMISTRY $200: It's the smallest unit of a substance that shows all the chemical properties of that substance Molecule |
| #3752, aired 2000-12-19 | CHEMISTRY $1000: It's an atom that has gained or lost one or more electrons, & carries a positive or a negative charge Ion |
| #3747, aired 2000-12-12 | SHORT SCIENCE BIOS $1000: Born in Copenhagen, remodeled the atom, died in Copenhagen, reborn in the play "Copenhagen" Niels Bohr |
| #3729, aired 2000-11-16 | CHEMISTRY $200: Carbon in this form has every atom linked tetrahedrally to 4 others, making it really hard Diamond |
| #3696, aired 2000-10-02 | SCIENCE CLASS $200: A substance whose molecules contain more than one kind of atom, like water's hydrogen & oxygen atoms compound |
| #3666, aired 2000-07-10 | WHO'S ON THE BRITISH THRONE? $800: Atom bomb dropped on Hiroshima George VI |
| #3612, aired 2000-04-25 | CHEMISTRY $1,000 (Daily Double): This word means to remove 2 hydrogen atoms from a compound for each oxygen atom removed dehydrate |
| #3603, aired 2000-04-12 | ACADEMIA NUTS $100: Theoretical physicist John Dalton stated firmly in 1803, "Thou knowest no man can split" one of these Atom |
| #3518, aired 1999-12-15 | PHYSICS $600: From the Greek ienai, "to go", Michael Faraday coined this term for an atom with an electrical charge Ion |
| #3451, aired 1999-09-13 | A CENTURY OF PHYSICS $200: Ernest Rutherford, the first to split this central part of the atom, doubted you could get power by doing so Nucleus |
| #3382, aired 1999-04-27 | CHEMISTRY $600: A free radical is an atom or molecule that has an odd number of these electrons |
| #3364, aired 1999-04-01 | SCIENCE $600: Mass number is defined as the number of neutrons & these particles in an atom's nucleus Protons |
| #3340, aired 1999-02-26 | PUT 'EM IN ORDER $400: Hydrogen bomb,
atom bomb,
Ritchie Valens' "La Bamba" atom bomb, hydrogen bomb, Ritchie Valens' "La Bamba" |
| #3332, aired 1999-02-16 | "A" & "E" $200: The part of an atom that orbits around the nucleus Electron |
| #3230, aired 1998-09-25 | 1930S SCIENCE $400: It was an atom of this element that Otto Hahn split in 1938 Uranium |
| #3182, aired 1998-06-02 | 3-LETTER SCIENCE $400: A neutral atom will become one of these when it gains or loses an electron Ion |
| #3077, aired 1998-01-06 | CHEM LAB $800: An atom or molecule with a single unspoiled one of these is a free radical, man Electron |
| #3001, aired 1997-09-22 | BREAKING UP IS HARD TO DO $400: In 1938 2 Germans became the first to split this, producing barium & krypton from uranium an atom |
| #2997, aired 1997-09-16 | SCIENCE $300: It's defined as an atom or group of atoms that has an electrical charge Ion |
| #2928, aired 1997-04-30 | GENERAL SCIENCE $400: This tiny center region of an atom consists of protons & neutrons nucleus |
| #2878, aired 1997-02-19 | THE ELEMENTS $800: A molecule of ammonia is made up of 3 hydrogen atoms & 1 atom of this element nitrogen |
| #2805, aired 1996-11-08 | CHEMISTRY $400: The energy level of these particles shows if an atom is in its ground state or an excited state electrons |
| #2753, aired 1996-07-17 | SCIENCE $200: Almost the entire mass of an atom is contained in this central portion Nucleus |
| #2737, aired 1996-06-25 | WEIGHTS & MEASURES $3,600 (Daily Double): In 1967 this unit of time was defined as 9,192,631,770 cycles of radiation of a cesium-133 atom the second |
| #2668, aired 1996-03-20 | SUBATOMIC PARTICLES $200: Protons are found in this part of an atom the nucleus |
| #2658, aired 1996-03-06 | SCIENCE $200: In an atom these elementary particles spin around the nucleus electrons |
| #2519, aired 1995-07-13 | SCIENTISTS $1000: This Danish physicist amplified Rutherford's model of the atom Niels Bohr |
| #2440, aired 1995-03-24 | THE ATOM $200: World Book says that in an atom 4 miles in diameter, this center part would be the size of a tennis ball the nucleus |
| #2440, aired 1995-03-24 | THE ATOM $400: Of indivisible, unseen or unnatural, the meaning of atomos, the word that "atom" came from indivisible |
| #2440, aired 1995-03-24 | THE ATOM $600: When 2 atoms join in compounds, they form units called these molecules |
| #2440, aired 1995-03-24 | THE ATOM $800: The chemical behavior of an atom is mainly determined by the number of these in its outer shell electrons |
| #2440, aired 1995-03-24 | THE ATOM $1000: Of the 3 basic subatomic particles, it has the greatest mass & has no charge the neutron |
| #2411, aired 1995-02-13 | AMERICAN HISTORY $1000: U.S. Army General Leslie Groves was chief administrator of this program to build the atom bomb the Manhattan Project |
| #2380, aired 1994-12-30 | SCIENCE $400: Maria Goeppert Mayer shared a Nobel Prize for work on the structure of this part of an atom the nucleus |
| #2297, aired 1994-09-06 | 1911 $800: Physicist Ernest Rutherford announced his model for the structure of this the atom |
| #2280, aired 1994-07-01 | THE 20th CENTURY $600: On April 5, 1951 this husband & wife were sentenced to die as atom spies the Rosenbergs |
| #2159, aired 1994-01-13 | GENERAL SCIENCE $400: In 1938 Otto Hahn & Fritz Strassman discovered this process of splitting an atom nuclear fission |
| #2119, aired 1993-11-18 | FAMOUS SCIENTISTS $1000: In 1913 this Danish physicist proposed the first modern model of the atom Niels Bohr |
| #2098, aired 1993-10-20 | CHEMISTRY $200: The British once likened the structure of the atom to a plum pudding & these to the raisins the electrons |
| #2071, aired 1993-09-13 | THE ELEMENTS $300: In 1932 the first workable atom smasher broke lithium into this very light element helium |
| #2019, aired 1993-05-20 | BROADWAY MUSICALS $200: Dogpatch is almost hit by an atom bomb in this 1956 musical Li'l Abner |
| #1976, aired 1993-03-22 | SCIENCE $600: It's the most massive part of an atom the nucleus |
| #1945, aired 1993-02-05 | CHEMISTRY $600: An atom that loses one of these becomes a cation, a positively charged ion an electron |
| #1881, aired 1992-11-09 | GENERAL SCIENCE $1000: With 2 neutrons & 2 protons, an alpha particle is identical to the nucleus of an atom of this gas Helium |
| #1781, aired 1992-05-04 | NUCLEAR PHYSICS $200: From its resemblance to cell splitting in biology, the splitting of an atom is called this fission |
| #1733, aired 1992-02-26 | "E" "Z" SCIENCE $800: These negatively charged particles occupy almost the entire volume of an atom electrons |
| #1721, aired 1992-02-10 | SCIENCE & TECHNOLOGY $800: The cyclotron & synchrotron are examples of this machine used to speed up the movement of atomic matter particle accelerators (an atom smasher) |
| #1707, aired 1992-01-21 | CHEMISTRY $1000: 1 amu, or atomic mass unit is 1/12 of the mass of an atom of this element carbon |
| #1688, aired 1991-12-25 | WORD ORIGINS $300: This central part of an atom is Latin for kernel a nucleus |
| #1557, aired 1991-05-14 | PHYSICS $200: Binding energy holds neutrons & protons together in this part of an atom the neucleus |
| #1536, aired 1991-04-15 | "I" IN SCIENCE $100: An atom that becomes electrically charged by gaining or losing an electron ion |
| #1521, aired 1991-03-25 | CHEMISTRY $800: They're said to form a cloud around the nucleus of an atom electrons |
| #1474, aired 1991-01-17 | SCIENCE $500: A positive ion is formed when an atom loses one or more of these Electron |
| #1463, aired 1991-01-02 | PHYSICS $500: An element's atomic number always tells how many of these particles it has in each atom protons |
| #7, aired 1990-07-28 | NUCLEAR PHYSICS $2500: The 2 forms of energy produced by splitting an atom radiation & heat |
| #1321, aired 1990-05-07 | PHYSICAL SCIENCE $1000: When an atom undergoes a quantum leap, one of these of comparable energy, is emitted or absorbed photon |
| #1104, aired 1989-05-25 | STARTS WITH "V" $500: Expressed as a number, it's the capacity of an atom to combine with other atoms the valence |
| #1092, aired 1989-05-09 | NUCLEAR PHYSICS $100: Almost all of an atom's mass is contained within this nucleus |
| #1092, aired 1989-05-09 | NUCLEAR PHYSICS $500: Country in which Hahn & Strassmann 1st split the atom Germany |
| #1070, aired 1989-04-07 | SCIENCE $500: In 1895 J.J. Thomson discovered this small particle of the atom the electron |
| #1033, aired 1989-02-15 | NUCLEAR PHYSICS $200: Nuclear energy is released when this part of the atom is split the core (the nucleus) |
| #939, aired 1988-10-06 | MATHEMATICS $400: Unit of area used for sizes as small as the cross sections of an atom, it'd be tough to hit the broadside of one a barn |
| #934, aired 1988-09-29 | HISTORIC QUOTES $200: "The decision was mine alone," said Truman of this monumental event in 1945 dropping the atom bomb |
| #931, aired 1988-09-26 | CHEMISTRY $600: The atomic weight of an atom is the sum of the number of these in the nucleus protons & neutrons |
| #914, aired 1988-07-21 | SCIENTISTS $1000: This Dane, who explained the atom, donated his gold Nobel medal to Finnish war relief Niels Bohr |
| #892, aired 1988-06-21 | WORLD WAR II $200: He signed the famous letter warning FDR that Germany might be working on an atom bomb Einstein |
| #890, aired 1988-06-17 | 1962 $600: The theme of the World's Fair was "Man in the Space Age" & its symbol was this the Space Needle |
| #813, aired 1988-03-02 | CHEMISTRY $400: Bohr's model explained the structure of this the atom |
| #795, aired 1988-02-05 | 8-LETTER SCIENCE $300: While the smallest unit of an element is an atom, the smallest unit of a compound is this molecule |
| #726, aired 1987-11-02 | PHYSICAL SCIENCE $500: The 2 subatomic particles in an ordinary hydrogen atom proton & electron |
| #720, aired 1987-10-23 | WORLD WAR II $400: "Little Boy" was the code name for the atom bomb dropped on this city Hiroshima |
| #703, aired 1987-09-30 | SCIENCE $800: An atom of this element has only 1 electron hydrogen |
| #660, aired 1987-06-19 | NUCLEAR PHYSICS $300: Along with protons, these atomic particles in a nucleus make up most of an atom's mass neutrons |
| #505, aired 1986-11-14 | NUCLEAR PHYSICS $500: These negatively charged particles are found orbiting in a "cloud" around the nucleus of a stable atom electrons |
| #372, aired 1986-02-11 | NEVADA $400: In 1951, Yucca Flat exploded into the news when this began in the state the atom bomb (testing) |
| #363, aired 1986-01-29 | PHYSICAL SCIENCE $800: An ion is an atom that has a charge due to a gain or loss of these electrons |
| #337, aired 1985-12-24 | NUCLEAR PHYSICS $400: The ancient Greek Democritus gave us this word meaning "something that can't be cut" atom |
| #337, aired 1985-12-24 | NUCLEAR PHYSICS $1000: Mousetraps loaded with ping-pong balls show this effect in Disney's "Our Friend the Atom" chain reaction |
| #284, aired 1985-10-10 | SCIENCE $800: Avogadro's number is the total of these atom groups in a mole of any substance molecules |
| #267, aired 1985-09-17 | TECHNOLOGY $600: In 1970, an individual atom was 1st seen by using this device an electron microscope |
| #188, aired 1985-05-29 | PHYSICAL SCIENCE $600: An atom that has a charge due to a gain or loss of electrons is known as this an ion |
| #173, aired 1985-05-08 | NUCLEAR PHYSICS $200: In 1938, German chemists Hahn & Strassmann were 1st to do this to the atom split the atom |
| #173, aired 1985-05-08 | NUCLEAR PHYSICS $600: With 92 protons, 146 neutrons, & 92 electrons, it's the heaviest atom found in nature the uranium atom |
| #92, aired 1985-01-15 | SCIENCE $800: What an atom loses or gains when it is ionized electrons |
| #59, aired 1984-11-29 | SCIENCE $400: Negative particle that orbits an atom's nucleus an electron |
| #22, aired 1984-10-09 | ISLANDS $200: South Sea island synonymous with atomic-sized blasts & atom-sized swimsuits Bikini |
