What is the lightest gas?



  1. 0 Votes

    Hydrogen is the lightest gas, and used to be used to inflate dirigibles such as zeppelins. Unfortunately, it’s also highly flammable and can ignite easily, such as in the case of the Hindenburg disaster. Because it can be so dangerous, generally helium, the second-lightest gas, is now used to inflate objects lighter than air.

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