Question

write the electronic configuration of 1.H- 2.Na+ 3.O^2- 4.F-​

Answer 1

Answer:

$\implies{\sf H^{-} \: = \: 1s^2}$

$\implies{\sf Na^+ \: = [Ne] \: 3s^1}$

$\implies{\sf O^{-2} \: = [He] \: 2s^2 \: 2p^4}$

$\implies{\sf F^- \: = [He] \: 2s^2 \: 2p^5}$