Question

Nitrogen has the electronic configuration 1s² 2s² 2p¹x 2p¹y 2p¹z and not 1s² 2s² 2p²x 2p¹y 2pz which is determined by

(a) Aufbau principle

(b) Pauli's exclusion principle

(c) Hund's rule

(d) Uncertainty principle

Answer 1

Correct option is (c) Hund's rule

Hund's rule states that pairing of electrons in the orbitals of a subshell (orbitals of equal energy) starts when each of them is singly filled.