Chapter 6, Problem 94QP

Interpretation Introduction

Interpretation:

The ground state electronic configuration of selenium is to be obtained by using the Aufbau principle.

Concept introduction:

Aufbau Principle states that every electron occupies the orbitals in the increasing order of their energy.

The four steps for writing the ground state electronic configuration of an element are shown below:

An electron will enter the lowest energy orbital.

A maximum of two electrons can occupy each orbital.

In a degenerate orbital, the electrons do not pair until all the orbitals are occupied with at least one electron.

Electrons occupy the orbitals in the following order:

Noble gas core is used to represent electron configuration of all the elements except hydrogen and helium.

Noble gas core is an abbreviation in an atom’s electron configuration. It replaces the electron configuration of noble gas element most recently precede the element.