Question

Which electronic configuration of an element has abnormally
high difference between second and third ionization energy?
(a) 1s², 2s², 2p⁶, 3s¹ (b) 1s², 2s², 2p⁶, 3s¹ 3p¹
(c) 1s², 2s², 2p⁶, 3s² 3p² (d) 1s², 2s², 2p⁶, 3s²

Answer 1

Answer:

b.

the 3s shell will fill first so it should be 3s^2 3p^0

Answer 2

Option (b)

Explanation:

Electronic configuration

1s²,2s²,2p⁶,3s²,3p⁶

Hund's rule :Electrons occupy the orbitals of lowest energy.

So , electrons first occupy the s orbit then p orbit.

The electronic configuration in option (b) does not follow the Hund's law.