Statistics for Name that Gas! (Elements and Compounds in Chemistry)

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Hint	Gas	% Correct
The most common gas in the atmosphere	nitrogen	98%
Important gas for animals from air and water	oxygen	98%
Light gas that famously makes one's voice squeaky	helium	94%
Noble gas that was used to illuminate advertising signs	neon	90%
Flammable gas responsible for the Hindenburg's fire	hydrogen	74%
Formula NH3, used in household cleaners and rocket fuel	ammonia	72%
Greenhouse gas contained in cattle belches	methane	70%
Exhaled by land animals, its solid form is called "dry ice"	{carbon} {dioxide}	69%
Aka trioxygen, forms a protective layer that shields from UV	ozone	69%
Inert gas that is the third most common in the atmosphere	argon	67%
The lightest halogen (highly toxic)	fluorine	65%
Colorless, odorless toxic gas (product of incomplete combustion)	{carbon} {monoxide}	63%
Radioactive gas that can seep into people's houses	radon	63%
Noble gas found in atmosphere at less than 100 parts per billion	xenon	62%
Gas that was used as a chemical weapon in WW1	chlorine	59%
Noble gas appearing in atmosphere at 1 part per million	krypton	59%
Gas commonly used in barbecue stove gas tanks	propane	53%
General anesthetic also known as laughing gas	{nitrous} {oxide}	46%
Gas commonly used in cigarette lighters	butane	45%
Known for making one's voice lower-pitched when inhaled	{sulfur} hexafluoride	34%
Commonly known for embalming fluid (but actually a gas)	formaldehyde	24%