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The lightest gas in the universe is probably hydrogen having Atomic Mass 1 u.(approx).

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13y ago
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12y ago

hydrogen its in the table of the elements

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Related questions

Is helium the lightest gas in the atmosphere?

helium is the lightest air


Was helium the lightest gas?

Hydrogen was, and is, the lightest gas


Is hydrogen gas the lightest gas in the world?

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