What is the lightest gas?

Answer 1

Hydrogen

Answer 2

It is Hydrogen, it is the chemical element with atomic number 1. It is represented by the symbol H. With an average atomic weight of1.00794 u (1.007825 u for Hydrogen-1), hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe's chemical elemental mass. Stars in the main sequence are mainly composed of hydrogen in its plasma state. Naturally occurring elemental hydrogen is relatively rare on Earth.

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Answer 3

Hydrogen. This is because its atomic structure contains one proton, one neutron (or in some cases, no neutrons) and one electron, which are nearly massless particles, due to their size. This lack of subatomic particles results in little to no gravitational pull on it, causing it to float upwards much faster than other gases, such as neon or nitrogen.

Answer 4

hydrogen

Answer 5

helium

Answer 6

Helium

Answer 7

nitrogen