The lightest of the Group 0 gases, the first in the periodic table, was assigned a theoretical atomic mass between 5.3×10−11 and 9.6×10−7.
Unsur paling ringan dari gas Golongan Nol, unsur pertama pada Tabel Periodik, diperkirakan memiliki massa atom teoretis antara 5,3 × 10−11 dan 9,6 × 10−7.