What element has atomic mass 20 gas?

Answer 1

There are a lot:

1. all 6 noble gases, elements in group 18: He, Ne, Ar, Kr, Xe, Rn,
2. di-atomic gases of elements: N2, O2, F2, Cl2,
3. tri-atomic gas: ozone O3

Answer 2

There are 11 elements they include…Argon(Ar), Chlorine(Cl), Fluorine(F), Helium(He), Hydrogen(H), Krypton(Kr), Neon(Ne), Nitrogen(N), Oxygen(O), Xenon(Xe) and Radon.

Answer 3

Neon, symbol Ne, has an Atomic Mass of about 20.

Answer 4

At room temperature (20 deg C) and 1 atmosphere, the gases are: hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon.

Answer 5

o3

Answer 6

Neon