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Name That Gas! (Elements and Compounds in Chemistry)

For each clue, name the gas it describes!
All answers are one word, unless otherwise specified.
Hint: Answers in the first column are elements, while answers in the second column are not.
Quiz by
bannister
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Last updated: March 3, 2026
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First submittedNovember 15, 2021
Times taken3,002
Average score62.5%
Rating4.88
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Hint
Gas
The most common gas in the atmosphere
nitrogen
Important gas for animals from air and water
oxygen
Inert gas that is the third most common in the atmosphere
argon
Light gas that famously makes one's voice squeaky
helium
Highly flammable light gas used in the Hindenburg
hydrogen
Noble gas that was used to illuminate advertising signs
neon
Radioactive gas that can seep into people's houses
radon
Gas that was used as a chemical weapon in WW1
chlorine
The lightest halogen, an extremely reactive toxic gas
fluorine
Noble gas appearing in atmosphere at 1 part per million
krypton
Noble gas found in atmosphere at less than 100 parts per billion
xenon
Hint
Gas
The most abundant greenhouse gas in the atmosphere
water vapor
NH3, used in household cleaners and rocket fuel
ammonia
Greenhouse gas contained in cattle belches
methane
Aka trioxygen, forms a protective layer that shields from UV
ozone
Pungent chemical used to preserve biological specimens
formaldehyde
C4H10, commonly used in cigarette lighters
butane
C3H8, commonly used for grilling and heating fuel
propane
COCl2, used as a chemical weapon in WWI
phosgene
Foul-smelling toxic gas known for its rotten egg odor
hydrogen sulfide
Waste product of respiration of aerobic organisms
carbon dioxide
General anesthetic also known as laughing gas
nitrous oxide
Colorless, odorless toxic gas (product of incomplete combustion)
carbon monoxide
Dense gas famously used for making voices sound deeper
sulfur hexafluoride
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6 Comments
bannister
+2
Level 89
Sep 9, 2022
Also try Name that Liquid!!
Chutney
+1
Level 64
May 12, 2022
Carbon Monoxide is a product of *incomplete* combustion. Otherwise, great quiz!
bannister
+1
Level 89
May 12, 2022
Thanks, Chutney! I added that!
Quizychemiczne
+4
Level 71
Sep 25, 2024
Quiz is great, but for me it should also accept other names like Stock names or maybe even formulas like CO2
Dontforget
+2
Level 76
Sep 25, 2024
Nice quiz, nominated! Its strength is that it has a good selection of common/general answers where many other chemistry quizzes often miss the mark. Anyone with a science background stands a chance at this one. The questions are concise which is also well done.

I would suggest allowing the chemical formulas as type-ins, at least for the diatomic elements, but really for all of them because most quizzes on this site accept them and people are expecting it especially for CO2 and CH3. (Though personally, I would recommend adding the empirical formulas as type-ins for any of them that are molecules)

I would also recommend standardizing the formatting (colours and capitalization) to match the typical formatting scheme of the rest of the site as it will increase your chances of getting nominated

That's just my two cents, it already has a number of nominations so it stands a chance at getting featured. Best of luck and cheers!

overtired
+2
Level 88
Mar 3, 2026
Huh, water vapour. Very interesting!

TIL how to spell formaldehyde.

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