- Created by: Ellsbells98
- Created on: 08-06-15 10:52
Electrons always occupy shells (energy levels).
The lowest energy level is always filled first - the one closest to the nucleus.
Only a certain number of electrons are allowed in each shell.
1st shell: 2
2nd shell: 8
3rd shell: 8
Atoms are much happier when they have full electron shells.
In most atoms, the outer shell is not full and this makes the atom want…