Question

Give the electronic configuration of
1. Al atom and its ion.
2.O atom and its ion.

Answer 1

al atom-1s^2 2s^2 2p^6 3s^2 3p^1
al ion- 1s^2 2s^2 2p^6
o atom- 1s^2 2s^2 2p^4
o ion-1s^2 2s^2 2p^6

Answer 2

Al atom K L M N

13 2 8 3 -

Al ion K L M N

13-3=10 2 8 - -

O atom K L M N

8 2 5 - -

O ion K L M N

8+2=10 2 8 - -