Question:

Is there a Gas that is lighter than Helium?

by  |  earlier

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Naturel or artificial? real or hyperthetical?? whats its name???

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4 ANSWERS


  1. There are 3:

    protium( H ) ,deuterium , Tritium  


  2. Hydrogen

  3. hydrogen.

    make it a good day

  4. Natural, real, hydrogen.

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