helium / neon / argon belong to noble gases family , group 18 on the periodic table & the chemical symbol for argon is ar & the chemical symbol for helium is he & the chemical symbol for neon is ne -> he, ne, mass belong to commoners fur family, person biosphere on the periodic desk he, ne, ar belong to noble gases family, group 18 on the periodic table  he, ne, ar belong to noble gases family, group 18 on the periodic table & spacesuit in the same person on the periodic desk of uses have similar thickness -> he, ne, ar have similar properties