| #9080, aired 2024-04-12 | DROP IN... $1600: From a word meaning penniless to get this word for a liquid in chemistry like an ester or ketone solvent |
| #9072, aired 2024-04-02 | FICTION $400: Scientist Elizabeth Zott ends up hosting a cooking show called "Supper at Six" in this 1960s-set novel Lessons in Chemistry |
| #9063, aired 2024-03-20 | UNDENIABLE CHEMISTRY $2000: The number of variables that must be fixed to define a physical state is expressed in "degrees of" this, also a noble concept freedom |
| #26, aired 2024-01-23 | ORGANIC CHEMISTRY $400: In chemistry, it's the unit of measure equal to 6.02 times 1023 of anything -- atoms, molecules... even mammals that burrow in your lawn a mole |
| #9012, aired 2024-01-09 | U.S. NOBEL PEACE PRIZE WINNERS $1200: Before winning a Peace Prize in 1962, scientist & vitamin C advocate Linus Pauling won one in this category in 1954 chemistry |
| #9007, aired 2024-01-02 | AT THE MUSEUM $600: The former Radium Institute is now a Paris museum where you can see her old chemistry lab, which was decontaminated in 1981 Marie Curie |
| #8961, aired 2023-10-30 | ORGANIC CHEMISTRY $800: Atoms in the compound carbon dioxide share two pairs of electrons, forming a double covalent this a bond |
| #8961, aired 2023-10-30 | ORGANIC CHEMISTRY $1600: An alkyl is a hydrocarbon that has lost one of these atoms that has just 1 proton in its nucleus hydrogen |
| #8900, aired 2023-06-23 | A CHEMISTRY TEST $1600: In the Haber process, magnetite is used as one of these, any substance that speeds up a chemical reaction a catalyst |
| #8804, aired 2023-02-09 | CHEMISTRY $1600: "D" is for this chemical process seen here in which a liquid is turned to a vapor then condensed back into a liquid distillation |
| #10, aired 2023-01-12 | WE'VE GOT CHEMISTRY $1200: The chemical elements are arrayed according to atomic number on this, a name indicating regular intervals periodic table |
| #8762, aired 2022-12-13 | CHEMISTRY $1200: In chemistry it describes a substance that evaporates readily; it's the V in mVOC, smelly compounds produced by molds volatile |
| #8691, aired 2022-07-25 | CHEMISTRY $600: The human body produces this vitamin when a sterol in the skin absorbs radiation vitamin D |
| #8691, aired 2022-07-25 | CHEMISTRY $1000: Acids & bases are among these current conductors; using a solid instead of a liquid one reduces the risk of fire in batteries electrolytes |
| #8679, aired 2022-07-07 | SUCH GREAT CHEMISTRY $800: Using mass spectrometry, neon was the first element shown to exist in more than one of these stable variations an isotope |
| #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 |
| #8580, aired 2022-02-18 | IN THE CHEMISTRY LAB $400: In 1937 isotopes of this element, Cl, were separated using a vacuum ultracentrifuge chlorine |
| #8580, aired 2022-02-18 | IN THE CHEMISTRY LAB $800: From the French for "little tube" , one of these uses suction to transfer small amounts of liquid a pipette |
| #8580, aired 2022-02-18 | IN THE CHEMISTRY LAB $1200: Named for a German chemist, this tool seen here really turns up the heat a Bunsen burner |
| #8580, aired 2022-02-18 | IN THE CHEMISTRY LAB $2000: This receptacle used for melting metals has a name from the Latin for "cross" a crucible |
| #8580, aired 2022-02-18 | IN THE CHEMISTRY LAB $3,200 (Daily Double): Used to crush & grind, this pair of tools is featured in a permanent display at Philly's University of the Sciences mortar & pestle |
| #16, aired 2022-02-18 | SCIENCE FACT $1600: Chemistry news: this unit is no longer related to the No. of atoms in 12 grams of carbon-12, but directly to Avogadro's constant a mole |
| #15, aired 2022-02-18 | CHEMISTRY GLOSSARY $800: These units of heat weigh in at just over 4 joules; the ones counted by dieters are actually "kilo-" sized a calorie |
| #15, aired 2022-02-18 | CHEMISTRY GLOSSARY $1200: As the name implies, redox is a reaction in which these 2 actions take place reduction & oxidation |
| #15, aired 2022-02-18 | CHEMISTRY GLOSSARY $2000: Though it doesn't start with that letter, "S" represents this measure of the molecular disorder in a closed system entropy |
| #8531, aired 2021-12-13 | CHEMISTRY $800: In 1755 Joseph Black called it "fixed air"; today we call it a planetary problem carbon dioxide |
| #8525, aired 2021-12-03 | IT'S A SCIENCE $400: Marie Curie won Nobel prizes in these 2 categories physics & chemistry |
| #8412, aired 2021-06-01 | SCIENTISTS $600: We think of this Russian who became a professor of general chemistry in 1867, periodically Mendeleev |
| #8388, aired 2021-04-28 | WE HAVE SUCH CHEMISTRY $800: In 2015 DuPont spun off a company called Chemours to produce Opteon, Freon & this -on used on cookware Teflon |
| #8297, aired 2020-12-08 | AUTHORS' ALMA MATERS $1600: It's no science fiction that in 1948 this prolific Russian-born author received a Ph.D in chemistry from Columbia University Isaac Asimov |
| #8287, aired 2020-11-24 | GO "NUT"s $1200: Jerry Lewis played college chemistry instructor Julius Kelp, who undergoes a transformation in this classic film The Nutty Professor |
| #8221, aired 2020-05-25 | TV TEACHER APPRECIATION $400: On "Breaking Bad", a chilling medical diagnosis led to this chemistry teacher making significant changes in his life Walter White |
| #8199, aired 2020-04-09 | CHEMISTRY $1600: In a flame test, this element--atomic number 11--burns yellow; it's also often the basis of the yellow color in fireworks sodium |
| #8118, aired 2019-12-18 | PLACE ON EARTH $600: Here's a building in UNAM in Mexico City that is the school's Institute of this Chemistry |
| #8110, aired 2019-12-06 | IT'S NOT ROCKET SCIENCE $1600: It's chemistry or physics at a New Brunswick, New Jersey school founded in 1766 Rutgers science |
| #7997, aired 2019-05-21 | NEW IN SCIENCE $2000: Subject of "The Imitation Game", this British mathematician wrote one chemistry paper & it's being used in a new desalination method (Alan) Turing |
| #7956, aired 2019-03-25 | IS IT SCIENCE? $600: Chemistry sure is; in fact, it's this 4-letter kind of science dealing with things that can be observed & measured hard science |
| #7943, aired 2019-03-06 | HIGH-SCORING SCRABBLE WORDS $2000: The "Z" gets you off to a good start in this 25-point study of the chemistry of fermentation zymurgy |
| #7909, aired 2019-01-17 | CHEMISTRY $400: In chemistry, it's a substance with 2 or more different elements; in real estate, it's a property with multiple homes compound |
| #7605, aired 2017-10-06 | CHEMISTRY $800: In biology, an insectivore; in chemistry, a measuring unit of very small things a mole |
| #7590, aired 2017-09-15 | CHEMISTRY $1200: In 1923 Bronsted & Lowry determined that when an acidic substance loses a proton, it forms this a base |
| #7565, aired 2017-06-30 | SHAKE, RATTLE & ROLL WITH SCIENCE $600: Also meaning to upset someone, it's a fancy chemistry word for "shake", as in "Stopper the tube & ____ the solution" agitate |
| #7456, aired 2017-01-30 | CHEMISTRY $400: Melvin Calvin won a 1961 Nobel Prize for mapping the chemical reactions in this plant process photosynthesis |
| #7429, aired 2016-12-22 | CHEMISTRY $1000: Change the first letter in a synonym for "trying" & you get this process of determining the proportions of metal in ore assaying |
| #7275, aired 2016-04-08 | THERE'S CHEMISTRY BETWEEN US $400: The EPA says it's a problem if water has more of this element than 15 parts per billion; in 2015 Flint, Mich. tested at 27 lead |
| #7184, aired 2015-12-03 | CHEMISTRY $400: In 2012 scientists actually achieved a temperature lower than -459.67 degrees Fahrenheit, better known by this term absolute zero |
| #7184, aired 2015-12-03 | CHEMISTRY $800: A redox reaction is one in which this, a gain of electrons, & oxidation, a loss of electrons, go on simultaneously reduction |
| #7184, aired 2015-12-03 | CHEMISTRY $2000: When placed in the flame of a Bunsen burner, copper produces a blue flame; sodium, this color yellow |
| #7139, aired 2015-10-01 | "EX"CELLENT! $600: A concentrated substance used in chemistry or cooking an extract |
| #7054, aired 2015-04-23 | SCIENCE TERMS IN FRENCH $2,200 (Daily Double): In chemistry, "une liaison" is one of these, perhaps "ionique" a bond |
| #6992, aired 2015-01-27 | DISCOVERIES IN THE SCIENCES $600: A dress bottom inside the study of the elements hem (in chemistry) |
| #6960, aired 2014-12-12 | CHEMISTRY $400: The name of this gas comes from Amun, a temple in Libya near where its salts were obtained ammonia |
| #6960, aired 2014-12-12 | CHEMISTRY $800: In the Middle Ages, the best of these vessels used for melting materials were made in Hesse, Germany from a special clay crucibles |
| #6960, aired 2014-12-12 | CHEMISTRY $2000: Vermilion, a red pigment used in inks & paints, is made synthetically by reacting sulfur with this metal, Hg mercury |
| #6883, aired 2014-07-16 | A CHEMISTRY SET $1600: These 2 common antonyms precede "cell battery"; one type is in your car, the other, in your flashlight wet & dry |
| #6883, aired 2014-07-16 | A CHEMISTRY SET $2000: Change 1 letter in the material rubbed on violin bows to get this type of compound that can be solid or semisolid resin |
| #6883, aired 2014-07-16 | A CHEMISTRY SET $3,000 (Daily Double): In zoology, it's an insectivore; in chemistry it's a unit related to atomic weights a mole |
| #6805, aired 2014-03-28 | WE'VE GOT CHEMISTRY $1200: In 1938 a DuPont chemist's try at a gas refrigerant didn't pan out, but did lead to a solid non-stick polymer now known as this Teflon |
| #6805, aired 2014-03-28 | WE'VE GOT CHEMISTRY $4,000 (Daily Double): (Sarah of the Clue Crew does a demonstration with water in some flasks.) Unlike tap water, when you place tonic water near a blacklight, you'll find that it glows, due to the fluorescent properties of this alkaloid used in the treatment of malaria quinine |
| #6751, aired 2014-01-13 | CHEMISTRY $1200: Increasing the percentage of U-235 in a sample of uranium is called this process; Iran says it has the right to do it enrichment |
| #6751, aired 2014-01-13 | CHEMISTRY $2000: The buckyball, a stable, spherical molecule of this element, occurs naturally in soot carbon |
| #6611, aired 2013-05-20 | CHEMISTRY $1200: A calorimeter measures the amount of this released or absorbed in a chemical reaction heat |
| #6611, aired 2013-05-20 | CHEMISTRY $2000: In this process, a solid such as dry ice converts directly into a gas without going through the liquid stage sublimation |
| #6611, aired 2013-05-20 | CHEMISTRY $2,400 (Daily Double): (Jimmy of the Clue Crew presents the clue.) On TV, these two symbols play a part on "Breaking Bad", but in chemistry, they represent these two elements--one a toxic liquid, the other a metal bromine & barium |
| #6590, aired 2013-04-19 | COVERING YOUR BASES $400: In chemistry, a base is a substance that turns red vegetable dyes this color blue |
| #6580, aired 2013-04-05 | CHEMISTRY $800: Hydrogen peroxide in your bathroom is slo-o-owly undergoing this, a breakdown into components, like a dead organism decomposition |
| #6580, aired 2013-04-05 | CHEMISTRY $1200: When a substance forms clumps in water you've got a colloid; if it disperses uniformly it's this, like a 7% one a solution |
| #6443, aired 2012-09-26 | CHEMISTRY $1200: In osmosis, a liquid passes through a barrier usually called a semipermeable one of these a membrane |
| #6443, aired 2012-09-26 | CHEMISTRY $1600: In a standard lead-acid battery, lead plates & an electrolyte of this diluted acid create electrical energy sulfuric acid |
| #6326, aired 2012-03-05 | "A" IN CHEMISTRY $400: Sulfur dioxide emissions lead to this nasty atmospheric deposit acid rain |
| #6326, aired 2012-03-05 | "A" IN CHEMISTRY $800: It's in group 5a of the periodic table, sublimes at 1,135 degrees & my 2 zany aunts put it in elderberry wine arsenic |
| #6326, aired 2012-03-05 | "A" IN CHEMISTRY $1200: If a mechanic tells you he put CH2(OH)CH2(OH) in your radiator, he means this antifreeze |
| #6326, aired 2012-03-05 | "A" IN CHEMISTRY $1600: There are 2 types of solid: ice & sugar are crystalline, while glass & blankets are this, meaning "shapeless" amorphous |
| #6326, aired 2012-03-05 | "A" IN CHEMISTRY $2000: This adjective can precede "entropy" or "zero" absolute |
| #6198, aired 2011-07-20 | THE STYLE OF ELEMENTS $800: (Sarah of the Clue Crew holds a wall clock with symbols of the elements instead of numbers.) The Chem Time Clock helps chemistry students learn the periodic table by using elements' symbols in place of numbers; it's 1:35, or these two elements hydrogen & nitrogen |
| #6177, aired 2011-06-21 | INTERNATIONAL YEAR OF CHEMISTRY $2000: A solid can be finely analyzed using the EELS technique, which studies energy loss in these particles the electrons |
| #6104, aired 2011-03-10 | ARGONNE NATIONAL LABORATORY $1200: (Jimmy of the Clue Crew reports from the Argonne National Lab in Chicago.) The reactor is doing a green chemistry trick invented at Argonne--it's using plastic bags to create these, cylinders 50,000 times thinner than a hair, to increase the surface area & the power of batteries a nanotube |
| #6033, aired 2010-12-01 | BEYOND BELIEF $1600: A type of medieval chemistry, it aimed in part to transmute base metals into gold alchemy |
| #6016, aired 2010-11-08 | IT'S ELEMENTAL, MY DEAR $1200: To earn a B.A. in chemistry, you'd better know that Ba is the symbol for this barium |
| #5921, aired 2010-05-17 | CHEMISTRY $1200: Bittern, a solution rich in bromines, is what's left after this is crystallized from seawater salt |
| #5854, aired 2010-02-11 | WE'VE GOT CHEMISTRY $2000: The fundamental unit of substance used in chemistry, it's 6.02 x 1023 atoms, not a garden pest mole |
| #5806, aired 2009-12-07 | SUCH GOOD CHEMISTRY $400: In 1824 Jons Jakob Berzelius found this nonmetallic element that later lent its name to a California valley silicon |
| #5662, aired 2009-03-31 | SIGNIFICANT MOTHERS $800: Sadly, she died in 1934, just a year before daughter Irene won a Nobel Prize for chemistry Marie Curie |
| #5587, aired 2008-12-16 | WE REWRITE HISTORY! $1000: 2 people, please: in 1911 Paula Abdul won a Nobel for chemistry, after sharing a physics Nobel with hubby Richard Simmons Marie & Pierre Curie |
| #5558, aired 2008-11-05 | ELEMENTAL PROBLEMS $5,600 (Daily Double): "And God said unto Noah... make thee an ____ of gopher wood" ark: argon & potassium |
| #5475, aired 2008-05-30 | CHEMISTRY $1600: (Jimmy of the Clue Crew reports from the Jeopardy! lab.) Putting dry ice in water shows a solid transforming directly into a gas, a process called this sublimation |
| #5475, aired 2008-05-30 | CHEMISTRY $2000: Bromine & chlorine are in a group of elements better known by this name, from the Greek for "salt-forming" halogens |
| #5469, aired 2008-05-22 | CHEMISTRY $2000: A chemical in its Scotchgards persisted in the environment, so this company pulled the products 3M |
| #5461, aired 2008-05-12 | CHEMISTRY $800: (Jimmy of the Clue Crew squeezes lemon juice into a beaker of tea.) This type of acid in the lemon acts as a bleaching agent with the dye in the tea, causing the tea's color to fade citric acid |
| #5461, aired 2008-05-12 | CHEMISTRY $2000: The process of coating an object with metal by putting it in, say, a CuSO4 bath through which current is run electroplating |
| #5284, aired 2007-07-26 | "OUND" ABOUT $1000: In chemistry, a substance consisting of 2 or more elements a compound |
| #5119, aired 2006-12-07 | DUOS $600: "She gave him sex, and he gave her class" was said of the chemistry between this duo, paired in 10 movie musicals Fred Astaire & Ginger Rogers |
| #4860, aired 2005-10-28 | SCIENCE LAB $600: (Kelly of the Clue Crew juices a lemon in the chemistry lab.) This acid--C6H8O7--is found in the juice I'm extracting citric acid |
| #4858, aired 2005-10-26 | THE SMALL STUFF $600: (Kelly of the Clue Crew spoons out some slimy black fish eggs into a Petri dish in the chemistry lab.)
As opposed to beluga or ossetra, this type of caviar has the tiniest eggs, with about 2,500 per ounce sevruga |
| #4858, aired 2005-10-26 | THE SMALL STUFF $1000: (Kelly of the Clue Crew shows a hair under a magnifying glass in the chemistry lab.) This technology of endless possibilities has been defined as using structures less than one-thousandth the width of a hair nanotechnology |
| #4778, aired 2005-05-18 | CHEMISTRY $400: A dipole is a molecule in which this is opposite at the 2 poles charge |
| #4616, aired 2004-10-04 | AVIATION $800: In chemistry, it maintains a mixture resistant to change; when flying it controls the pitch of an aircraft the stabilizer |
| #4594, aired 2004-07-22 | SEDIMENTARY ROCK $1000: (Cheryl of the Clue Crew dissolves a piece of rock in a chemistry experiment.) With diluted hydrochloric acid, you can test for this rock; the acid reacts with the calcite to form CO2 limestone |
| #4539, aired 2004-05-06 | NOTABLE NAMES $400: Like mother, like daughter: her daughter Irene Joliot-Curie also won a Nobel Prize in Chemistry Marie Curie |
| #4485, aired 2004-02-20 | CHEMISTRY $1600: Usually, in a liquid solution, the less abundant substance is called the solute & the more abundant, this a solvent |
| #4447, aired 2003-12-30 | CHEMISTRY COMMERCIALS $5,000 (Daily Double): For a wide range of isotopes, look for this element under the Fm symbol (not available in nature) fermium |
| #4382, aired 2003-09-30 | ORGANIC CHEMISTRY $400: (Jimmy of the Clue Crew presents in front of a blackboard.) Atoms in the compound carbon dioxide share 2 pairs of electrons, forming a double covalent this bond |
| #4382, aired 2003-09-30 | ORGANIC CHEMISTRY $600: An alkyl is a hydrocarbon that has lost one of these atoms that has just 1 proton in its nucleus hydrogen |
| #4324, aired 2003-05-22 | SCIENCE $4,000 (Daily Double): Among the compounds called alkanes, the hexanes are C6H14--& these hydrocarbons are C8H18 octanes |
| #4292, aired 2003-04-08 | CHEMISTRY $1600: Heat a soda can with 1 tsp. of water in it, then invert it in a pot of water & it'll collapse by atmospheric this pressure |
| #4285, aired 2003-03-28 | SHE BLINDED ME WITH SCIENCE $1600: Dorothy Hodgkin's Nobel Prize in Chemistry was for her work on this vitamin, whose deficiency causes pernicious anemia Vitamin B12 |
| #4254, aired 2003-02-13 | FAMOUS AMERICANS $600: Dismissed from West Point for "deficiency in chemistry", he went on to paint a famous portrait of his mother James Whistler |
| #4108, aired 2002-06-12 | CHEMISTRY $400: In 1916 G. N. Lewis proposed that atoms in a molecule bond by sharing a pair of these particles electrons |
| #4108, aired 2002-06-12 | CHEMISTRY $2000: Enthalpy, a thermodynamic property of a substance, is abbreviated H, for this heat |
| #4098, aired 2002-05-29 | CHEMISTRY EXPERIMENTS $600: Wet steel wool in a jar helps demonstrate the formation of this; so does an old car rust |
| #4098, aired 2002-05-29 | CHEMISTRY EXPERIMENTS $1000: By putting silver & aluminum together in a solution, you can remove tarnish, caused by this element with the symbol S sulfur |
| #4084, aired 2002-05-09 | CHEMISTRY $1200: It's the valence number of the oxygen atom in a molecule of water 2 |
| #4052, aired 2002-03-26 | NOTABLE NAMES $600: The first woman to win a Nobel Prize, she won for Physics in 1903 & for Chemistry in 1911 Marie Curie |
| #4017, aired 2002-02-05 | STUFF THAT HAPPENED $800: In 1964 Dorothy Hodgkin became the third woman to win a Nobel in chemistry & the first without this last name Curie |
| #3956, aired 2001-11-12 | CHEMISTRY 101 $400: The temperature of this smokeless laboratory heating device is controlled by the amount of air in the tube a Bunsen burner |
| #3956, aired 2001-11-12 | CHEMISTRY 101 $800: (Hi, I'm Doctor Alan Heger, Nobel Prize-winner in Chemistry.) These large molecules are formed by the chemical linking of smaller molecules; nylon is a synthetic one a polymer |
| #3956, aired 2001-11-12 | CHEMISTRY 101 $1000: In this type of bond, 2 bonded atoms each contribute 1 electron to a pair, which the atoms then share a covalent bond |
| #3804, aired 2001-03-01 | INTELLIGENT FILMS $300: Chemistry whiz Julius Kelp devises a formula that transforms him into the suave Buddy Love in this 1963 comedy The Nutty Professor |
| #3729, aired 2000-11-16 | CHEMISTRY $600: I got an F in chemistry, this F, a gas Fluorine |
| #3729, aired 2000-11-16 | CHEMISTRY $1000: Colorful last name of the man famous for describing the motion of small particles in a gas or liquid Brown |
| #3672, aired 2000-07-18 | SCIENTISTS $100: Her daughter Irene also received a Nobel Prize in Chemistry Marie Curie |
| #3382, aired 1999-04-27 | CHEMISTRY $400: In the 1700s Georg Ernst Stahl coined the phlogiston theory, that a form of burning caused this on iron rust |
| #3382, aired 1999-04-27 | CHEMISTRY $1000: Bromine & chlorine are in a group of elements known by this name, from the Greek for "salt-forming" halogens |
| #3174, aired 1998-05-21 | WE GOT GOOD CHEMISTRY $400: This element is always in a carbide Carbon |
| #2962, aired 1997-06-17 | CHEMISTRY $800: The main ingredients in a detergent are called surface-active agents, or these for short Surfactants |
| #2962, aired 1997-06-17 | CHEMISTRY $1000: It's a system of small particles "hanging" in a liquid; paint, for example Suspension |
| #2943, aired 1997-05-21 | CHEMISTRY $400: An electron is said to be in this "state" when it's at a higher energy level than its ground state excited |
| #2805, aired 1996-11-08 | CHEMISTRY $100: A golden yellow when liquid, this element symbolized C is used as a bleach & in making plastics carbon (chlorine) |
| #2805, aired 1996-11-08 | CHEMISTRY $200: Symbolized Co, it's used in paints & varnishes & is essential for a good diet cobalt |
| #2739, aired 1996-06-27 | SCIENCE $1,500 (Daily Double): In chemistry they're the two processes in a redox reaction reduction & oxidation |
| #2715, aired 1996-05-24 | SCIENCE $800: In chemistry it's the type of bond in which 2 atoms share a pair of electrons covalent |
| #2657, aired 1996-03-05 | CHEMISTRY $200: Hold a lump of gallium in your hand & it will do this, so you can assume M&M's aren't coated with it melt |
| #2657, aired 1996-03-05 | CHEMISTRY $600: A "strong" one of these, like sulfuric or hydrochloric, will ionize completely in water An acid |
| #2605, aired 1995-12-22 | FAMOUS WOMEN $400: This current Attorney General holds a degree in chemistry as well as law Janet Reno |
| #2531, aired 1995-09-11 | CHEMISTRY $400: Vermilion, the red pigment in Chinese lacquer painting, is a compound of this metal, Hg mercury |
| #2351, aired 1994-11-21 | SIGNS & SYMBOLS $400: The sign for a doubled bond in chemistry resembles this sign in mathematics Equal sign |
| #2098, aired 1993-10-20 | CHEMISTRY $100: Minimum number of atoms in 1 molecule of a compound; for example, a molecule of table salt 2 |
| #2089, aired 1993-10-07 | CHEMISTRY $800: This positively-charged particle in a nucleus has 1,836 times the mass of an electron a proton |
| #1945, aired 1993-02-05 | CHEMISTRY $800: Burn a piece of sodium in a flask filled with chlorine gas & the resulting white powder is this salt |
| #1889, aired 1992-11-19 | CHEMISTRY $800: This acid is the electrolyte in a lead-acid battery Sulfuric Acid |
| #1707, aired 1992-01-21 | CHEMISTRY $600: In the atmosphere, this common gas exists mainly as a molecule of 2 atoms oxygen |
| #1574, aired 1991-06-06 | "C" IN CHEMISTRY $300: The reaction of a substance with oxygen to produce heat & light; it's a fancy way to say burning combustion |
| #1521, aired 1991-03-25 | CHEMISTRY $600: The color of litmus when it comes in contact with a substance that has a Ph value below 4.5 red (pink) |
| #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 |
| #931, aired 1988-09-26 | CHEMISTRY $800: You can clean silverware by boiling it in an aluminum pan using a solution of this, NaHCO3 sodium bicarbonate (baking soda) |
| #800, aired 1988-02-12 | CHEMISTRY $200: A rating for the performance of gas in a car engine, it measures the freedom from knocking octane |
| #765, aired 1987-12-25 | CHEMISTRY $200: Numerical isotope of carbon that's a useful tool in archaeological investigations carbon-14 |
| #488, aired 1986-10-22 | CHEMISTRY $1000: What the particles in a suspension will do over time that they won't do in a solution settle |
| #420, aired 1986-04-18 | 1890's $900 (Daily Double): 3 of original 5 prize categories established by Alfred Nobel's will after he died in 1896 (3 of) physics, physiology or medicine, chemistry, literature, & peace |
| #387, aired 1986-03-04 | CHEMISTRY $800: A French scientist named this metal used in nuclear control rods & color TVs in honor of his continent europium |
| #152, aired 1985-04-09 | NOBEL PRIZE $200: In 1903, she split a physics prize with her husband Pierre, but in 1911 got her own for chemistry Madame Curie |
| #110, aired 1985-02-08 | CHEMISTRY $1000: Metal with highest melting point, it's commonly used in light bulb filaments tungsten |
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Michael Farabaugh, a high school chemistry teacher from Charlottesville, Virginia
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Mary Ann Stanley, a high school chemistry and physical science teacher from Statesboro, Georgia
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"She's been teaching for 22 years and is now teaching the...
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Alex Johnson, an 11-year-old from Indianapolis, Indiana
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"He wants to be a chemist in the future. From Indianapolis,...
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Matt Schnippert, a sophomore at Florida State University from Jacksonville, Florida
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2001 College Championship 1st runner-up: $19,801. Matt was 19 at the...
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Robbie Berg, a freshman from the University of Pennsylvania
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2010-A College Championship quarterfinalist: $5,000. Hometown: Davie, Florida. Robbie Berg Blog...
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Than Hedman, a freshman from University of Colorado-Boulder
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2008 College Championship quarterfinalist: $5,000. 19 and from Denver, CO at...
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Katie Singh, a sophomore from Northwestern University from Austin, Texas
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2010-B College Championship quarterfinalist: $5,000 + a Nintendo Wii + the...
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Kevin Keach, a project administrator from St. Louis, Missouri
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"He considered himself a simple Missouri farm boy when he won...
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Zack Terrill, a senior at Vanderbilt University from Winter Springs, Florida
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2012 College Championship 2nd runner-up (semifinalist by wildcard): $25,000. 21 at...
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Jackson Jones, a junior at Vanderbilt University from Louisville, Kentucky
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"He was a semifinalist in the 2019 Teen Tournament as a...
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Will Harter, a 12-year-old from Park Ridge, Illinois
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"He would like to be a professional athlete. If that doesn't...
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Rajeev Gorowara, a chemical engineer from Wilmington, Delaware
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Season 26 player (2010-01-26). Husband of Season 25 2-time champion Christine...
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James Holst, a researcher from Ida Grove, Iowa
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Season 25 1-time champion: $24,801 + $2,000.
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Paul Wampler, a web programmer from Knoxville, Tennessee
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Season 27 4-time champion: $72,001 + $2,000.
Jeopardy! Message Board user name: paul5562
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Andrew Watkins, a junior from Pittsburgh, Pennsylvania
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2006 Teen Tournament quarterfinalist: $5,000.
Jeopardy! Message Board user name: everyday847
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Amy Levine, a freshman from North Potomac, Maryland
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2007 Teen Tournament Summer Games quarterfinalist: $5,000. 15 at the time...
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Tom Toce, an actuary from New York, New York
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Season 26 2-time champion: $39,200 + $2,000. Last name pronounced like...
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Vicky Manos, a sophomore at St. John’s University from Levittown, New York
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2004 College Championship semifinalist: $10,000.
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