Electronic structure

Question 1

Electron shell rules 1-3

Answer 1

1) Electrons always occupy shells

2) The lowest energy level filled up first - the one closest to nucleus

3) certain number of electrons allowed in each shell

1st shell : 2 2nd shell : 8 3rd shell : 8

Question 2

Electron shell rules 4-5

Answer 2

4) Atoms happier with full electron shells - like the noble gases in group 0

5) Most atoms don’t have a full outer shell and makes them want to react to fill it