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Hydrogen gas is the lightest. With a formula of H2, it has an Atomic Mass of only half that of helium. It is highly reactive and there isn't much of it just floating around by itself. Plus, because it is so light, it just floats right up out of our atmosphere and into space.
Wiki User
∙ 11y ago
Wiki User
∙ 6y agohelium
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Is helium the lightest gas in the atmosphere?
helium is the lightest air
What is the lightest gas in air?
The lightest gas in the universe is probably hydrogen having atomic mass 1 u.(approx).
What element is the lightest gas?
Hydrogen
Lightest inert gas?
Helium
What is the lightest inhert gas?
helium
Is helium the lightest gas in the atmosphere?
helium is the lightest air
What is the lightest gas in air?
The lightest gas in the universe is probably hydrogen having atomic mass 1 u.(approx).
Was helium the lightest gas?
Hydrogen was, and is, the lightest gas
Is hydrogen gas the lightest gas in the world?
Yes it is, and it's also the lightest gas in the universe.
Which matter is lightest in weight?
gas is the lightest in weight
What is the lightest air?
hot air
How can you find the lightest gas and the lightest liquid?
generally, you can look at the Periodic Table of Elements. hydrogen is the lightest of both
Name the lightet gas?
the lightest gas is hydrogen
Which gas is the lightest?
hydrogen
What element is the lightest gas?
Hydrogen
Lightest inert gas?
Helium
What is the lightest inhert gas?
helium
