Question

Except for helium, how many electrons do noble gases have in their outer energy levels?

Answer 1

`8` at GCSE and `8` at A level

Answer 2

`8` electrons.

Explanation:

The `"octet rule"` determines the number of valence electrons in the noble gases, excluding He. Noble gases have the general electronic configuration `ns^2np^6`.

Noble gases are typically nonreactive. They do, however, have some cool applications e.g. neon lights