Which of the following species has the highest melting point?

CHEMISTRY · Single correct · A Level · Chemistry · Bonding · Bonding

Problem

Which of the following species has the highest melting point? (A)

1s^2 2s^2 2p^6 3s^1

(B)

1s^2 2s^2 2p^6 3s^2

(C)

1s^2 2s^2 2p^6 3s^2 3p^1

(D)

1s^2 2s^2 2p^6 3s^2 3p^2