Question

Choose the ground state electron configuration for Cr3+.

a) [Ar]
b) [Ar]4s23d1
c) [Ar]4s13d2
d) [Ar]4s23d6
e) [Ar]3d3

Answer 1

Therefore, the ground state electron configuration for Cr3+ is [Ar]3d34s0. The ground state electron configuration for Cr3+ is [Ar]3d34s0.

Step-by-step explanation:

The ground state electron configuration for Cr3+ is [Ar]3d34s0.

Cr3+ has lost three electrons from its neutral atom, chromium (Cr)

The electron configuration of chromium is [Ar]3d54s1, so when it loses three electrons, the 3d sublevel is filled and the 4s sublevel is empty.

Therefore, the ground state electron configuration for Cr3+ is [Ar]3d34s0.