Chapter 5.2, Problem 10LC

Interpretation Introduction

Interpretation: To determine the three rules of the electronic configuration of elements.

Concept Introduction: The electronic configuration tells how electrons will be filled in the different kinds of orbitals like s, p, d, and f orbitals.

Answer to Problem 10LC

There are generally three rules to explain the electronic configuration of an element.

• The Aufbau Principle
• The Pauli-Exclusion Principle.
• Hund's Rule.

Explanation of Solution

It is found that three are three rules which explain the electronic configuration of elements.

1. The Aufbau Principle:
According to this rule, electrons first fill atomic orbitals with lower energy before moving on to those with higher energy.
2. Hund’s rule:
According to Hund's rule, if a group of orbitals is being filled by electrons who have the same energy, then the first single electron is filled in each orbital.
3. The Pauli exclusion principle:
According to Pauli's Exclusion Principle, no two electrons within the same atom could have values including all four respective quantum numbers that are the same.