Chapter 9, Problem 22E

Interpretation Introduction

Interpretation:

Hund’s rule and its importance in writing the orbital diagram are to be explained.

Concept introduction:

Electrons first enter with parallel spin in orbitals having same energy.

Hund’s rule is also called hund’s rule of maximum multiplicity. It states that “the pairing of electrons in the orbital belonging to same sub shell does not take place until each orbital belonging to that sub shell has got one electron each i.e. is singly occupied”