One of the lightest and most non-combustible gases.
| February 18, 2021 | education
The five lightest gases look like this: hydrogen, helium, methane, ammonia, hydrogen fluoride. Hydrogen is a combustible gas. When mixed with air, hydrogen forms an explosive mixture. Helium is an inert, non-combustible gas. It is much lighter than air. At one time, it was helium that replaced hydrogen when filling balloons and airships, as the safest.
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