Question

The electronic configuration of gadolinium (Atomic number
64) is
(a) [Xe] 4f⁸ 5d⁰ 6s² (b) [Xe] 4f³ 5d⁵ 6s²
(c) [Xe] 4f⁶ 5d² 6s² (d) [Xe] 4f⁷ 5d¹ 6s²

Answer 1

Answer:

answer is D OPTION

OKKKKKK

Answer 2

The electronic configuration of Gadolinium element(atomic number 64) is

[Xe]4f⁷ 5d¹ 6s²

1) since in the above electronic configuration the f block is half filled which make it more stable as we know half and full filled subshell are more stable then those which are not.

2) also the energy difference between 4f and 5d is almost negligence so the electron jumps from 4f to 5d.

3) so option (d) is the right answer