Question

ELECTRONIC CONFIGURATION!!!!!!
1.oxygen and magnesium

Answer 1

oxygen - 1s2 2s2 2p4
magnesium- 1s2 2s2 2p6 3s2

Answer 2

oxygen= 1$s^{2}$ 2$s^{2}$ 2$p^{4}$
magnesium= 1$s^{2}$ 2$s^{2}$ 2$p^{6}$ 3$s^{2}$