Chapter 22, Problem 4PS

Interpretation Introduction

Interpretation:

The elements with unfilled 3d orbitals from the given list have to be identified.

Concept introduction:

The electron configuration tells us in which orbitals the electrons for an element are located. Three rules are,

• Electrons fill orbitals staring with lowest n and moving upwards(Aufbau principle)
• No two electrons can fill one orbital with the same spin(Pauli Exclusion Principle)
• For orbitals within the same subshell, the electrons fill each orbital singly before any orbital gets a second electron (Hund’s rule).

Maximum ten electrons must be there in the d orbitals.