What do you know about helium?
The atomic number is 2 and the mass number is 4.002602. It is located in group 18 which is a group of noble gases and it is in period 1. Helium is a gas which means it's a non-metal.
Helium is used as a carrier gas in gas chromatography.
Helium is used to pressurize and purge systems of unwanted gases.
Helium is used to condense hydrogen and oxygen to make rocket fuel.