Question

Number of electrons needed to fill the outer shell in magnesium

Answer 1

Magnesium atomic number=12

1s2 2s2 2p6 3s2 the last layer consists 3s2 2p6 it doesn t have 3p6 so 6 electrons needed to fill the outer shell

Answer 2

Magnesium would need 6 electrons to fill its outer shell.