| Hint | Gas | % Correct |
|---|---|---|
| The most common gas in the atmosphere | nitrogen | 99%
|
| Important gas for animals from air and water | oxygen | 98%
|
| Light gas that famously makes one's voice squeaky | helium | 95%
|
| Noble gas that was used to illuminate advertising signs | neon | 90%
|
| Highly flammable light gas used in the Hindenburg | hydrogen | 79%
|
| NH3, used in household cleaners and rocket fuel | ammonia | 71%
|
| Greenhouse gas contained in cattle belches | methane | 71%
|
| Aka trioxygen, forms a protective layer that shields from UV | ozone | 70%
|
| Waste product of respiration of aerobic organisms | {carbon} {dioxide} | 68%
|
| Noble gas found in atmosphere at less than 100 parts per billion | xenon | 68%
|
| The lightest halogen, an extremely reactive toxic gas | fluorine | 67%
|
| Inert gas that is the third most common in the atmosphere | argon | 66%
|
| Radioactive gas that can seep into people's houses | radon | 66%
|
| C3H8, commonly used for grilling and heating fuel | propane | 65%
|
| Noble gas appearing in atmosphere at 1 part per million | krypton | 63%
|
| C4H10, commonly used in cigarette lighters | butane | 62%
|
| Gas that was used as a chemical weapon in WW1 | chlorine | 62%
|
| Colorless, odorless toxic gas (product of incomplete combustion) | {carbon} {monoxide} | 60%
|
| General anesthetic also known as laughing gas | {nitrous} {oxide} | 46%
|
| Pungent chemical used to preserve biological specimens | {formaldehyde} | 35%
|
| The most abundant greenhouse gas in the atmosphere | {water} {vapor} | 31%
|
| Dense gas famously used for making voices sound deeper | {sulfur} hexafluoride | 27%
|
| Foul-smelling toxic gas known for its rotten egg odor | {hydrogen} {sulfide} | 20%
|
| COCl2, used as a chemical weapon in WWI | {phosgene} | 15%
|