Answer to Question #88510 in Chemistry for karina

Question

what species has the electron configuration [Ar]3d^4?
Mn2+?
Cr2+?
v3+?
Fe3+?
k+?

Answer 1

What species has the electron configuration [Ar]3d^4?

Mn2+?

Cr2+?

v3+?

Fe3+?

k+?

Solution:

1.[Ar]3d^4 means 22 electrons.

2.Cr has 24 electrons, but Cr ²⁺  has 22 electrons.

Answer: Cr ²⁺ has the electron configuration [Ar]3d^4.