hydrogen

Chemistry Science 31 of 31 appearances
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"hydrogen" appearances by year

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All Chemistry clues by year

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# Clue Answer As Given Value Round Category Air Date Show
An alkyl is a hydrocarbon that has lost one of these atoms that has just 1 proton in its nucleus hydrogen $1,600 DJ ORGANIC CHEMISTRY 2023-10-30 #8961
It has the atomic No. 1 & is the most abundant element in the universe hydrogen $400 DJ CHEMICAL ELEMENTS 2020-10-22 #8264
It's the only chemical element that weighs less than helium hydrogen $400 DJ CHEMISTRY 2020-02-18 #8162
This element's name is derived from the Greek for "water" & "born" hydrogen $200 J ELEMENTAL 2018-11-19 #7866
It's number 1! hydrogen $400 DJ NAME THAT ELEMENT 2015-09-24 #7134
It makes up about 11% of the weight of water hydrogen $800 DJ THE ELEMENTS 2014-02-13 #6774
It's thought that in the early universe, this element made up 75% of all mass hydrogen $200 J ELEMENT-ARY SCHOOL 2010-12-31 #6055
About 10% of you is this simplest element hydrogen $200 J THE HUMAN ELEMENT 2007-02-22 #5174
It was named from the Greek for "maker of water", as water was produced when this element burned hydrogen $800 DJ ELEMENTAL ETYMOLOGIES 2006-10-18 #5083
The pH in pH scale stands for "potential of" this element hydrogen $800 DJ THE ELEMENTS 2005-05-09 #4771
All elements except this one have neutrons in the nucleus hydrogen $2,000 DJ THE ELEMENTS 2005-03-04 #4725
With 1 as its atomic number, this gas heads up the periodic table hydrogen $400 J IT'S ELEMENTAL 2004-11-03 #4637
When you see starlight, star bright, know it's from the star burning this gas, whose symbol is H hydrogen $400 J ELEMENT-ARY SCHOOL 2004-05-07 #4540
A 1998 experiment heated deuterium to 70,000 degrees as part of an effort to make this element transition to a metal hydrogen $2,000 DJ CHEMISTRY 2004-03-11 #4499
You've tried other peroxides, like zinc & barium--it's time to come back to this most widely used one hydrogen $400 DJ CHEMISTRY COMMERCIALS 2003-12-30 #4447
An alkyl is a hydrocarbon that has lost one of these atoms that has just 1 proton in its nucleus hydrogen $600 J ORGANIC CHEMISTRY 2003-09-30 #4382
Atoms of this abundant element are the smallest & simplest known hydrogen $400 DJ THE ELEMENTS 2002-11-19 #4192
It's the most abundant element in the universe hydrogen $800 DJ THE ELEMENTS 2002-02-04 #4016
The atoms of this element have only one proton & no neutrons in the nucleus Hydrogen $400 DJ CHEMISTRY 2001-03-06 #3807
It's the only element that weighs less than helium Hydrogen $200 DJ THE ELEMENTS 2001-02-15 #3794
French chemist Lavoisier gave this element its name, which is from the Greek for "water forming" Hydrogen DD $2,200 DJ ELEMENTAL NAMES 2000-12-06 #3743
To make water put together 1 O, oxygen, with 2 H's, which are this element hydrogen $600 DJ ELEMENT-ARY SCHOOL 1999-09-08 #3448
The name of this element comes from Greek meaning "water forming" hydrogen $400 DJ THE ELEMENTS 1996-05-07 #2702
The atomic weight of carbon is 12.011; the atomic weight of this element is 1.008 hydrogen $400 DJ THE ELEMENTS 1996-02-14 #2643
It's the first element on the periodic table that's a gas hydrogen $500 J THE ELEMENTS 1993-11-08 #2111
The Germans call this element Wasserstoff Hydrogen DD $700 DJ THE ELEMENTS 1993-11-02 #2107
The name of this element means "water forming" hydrogen $400 DJ THE ELEMENTS 1993-04-06 #1987
The chief industrial use of nitrogen & this element is the manufacture of ammonia hydrogen $1,000 DJ THE ELEMENTS 1992-09-07 #1836
In 1766 Henry Cavendish called this gas with 1 proton & 1 electron "inflammable air" hydrogen $600 DJ THE ELEMENTS 1991-12-16 #1681
It's the "H" in pH hydrogen $200 DJ CHEMISTRY 1988-03-02 #813
The only element with only one electron in its K shell hydrogen $600 DJ CHEMISTRY 1988-02-12 #800
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