When elements react, their atoms complete their outer shells by losing, gaining, or sharing electrons. The atoms of noble gases already have complete outer shells, so they have no tendency to lose, gain, or share electrons. This is why the noble gases are inert and do not take part in chemical reactions.
The table summarises the electronic structures of elements in groups 1, 7 and 0. You should see that:
The main properties of the noble gases include:
Many uses of the noble gases are linked to one or more of these properties. For example: