Question

Explain why group 8 elements of the periodic table are referred to as group 0

Answer 1

They used to be called group 8 because they have 8 electrons on their outer shell, but then they realised helium only has 2, so they renamed it to group 0. Also, they are called group 0 because they have zero reactivity, they cannot bond with other atoms.

Answer 2

Answer: They have eight outer electrons.

Explanation: They don't need any more electrons to be added to them and can't give out any electrons to other groups. They have a complete outer shell.