Chapter 12, Problem 18PS

Interpretation Introduction

Interpretation:

Number of molecular orbitals formed from combination of 3s and 3p atomic orbitals in one mole of magnesium atom and fraction of the orbitals that will be occupied by the electrons have to be calculated.

Concept introduction:

Molecular orbital tells that where an electrons is present in the orbital. Molecular orbital is formed by the combination of atomic orbitals. The Molecular orbital are bonding molecular orbital and anti-bonding molecular orbitals.

The electronic configuration of magnesium is $\left[\text{He}\right]{\text{ 2s}}^{\text{2}}{\text{ 2p}}^{\text{6}}{\text{3s}}^{\text{2}}(\text{or) } {\text{1s}}^{\text{2}}{\text{2s}}^{\text{2}}{\text{2p}}^{\text{6}}{\text{3s}}^{\text{2}}.$