Chapter 5, Problem 65QRT

Interpretation Introduction

Interpretation:

The electronic configuration of $\text{Cr,}{\text{Cr}}^{\text{2+}}\text{,}\text{and}{\text{Cr}}^{\text{3+}}$ has to be given.  Also, the number of unpaired electrons has to be determined using the atomic orbital diagrams.

Concept Introduction:

Hund’s rule:  Each orbital must be singly occupied before any orbital is occupied.  All the electrons in singly occupied orbitals have same spin.