Noble gas, a very un-reactive one. But it can form some salts containing He2+2 , HeH+ , FHeO- , ions.
It is a noble gas.
helium is a gas at STP
helium is a noble gas / inert gas / group 18 element
Helium is a noble gas with 2 valence electrons.
Helium has only one type of gas (which is helium itself)
Mostly hydrogen and helium.
Helium.
helium
hydrogen and helium
Helium is a noble gas and is located in the group 18 of the periodic table.
indland
Helium gas is used in a balloon vendor.
hydrogen combine to form helium by nuclear fusion reaction