Chapter 5, Problem 71QRT

Interpretation Introduction

Interpretation:

The electronic configuration of ${\text{Na}}^{\text{+}}\text{,}{\text{Al}}^{\text{3+}}\text{,}\text{and}{\text{Cl}}^{\text{-}}$ has to be written.  Also, ions that are isoelectronic have to be identified.

Concept Introduction:

Electron configuration:  The complete description of the atomic orbitals occupied by all the electrons in an atom or monoatomic ion is known as its electron configuration.

Isoelectronic:  Atoms and ions that have same electron configuration are said to be isoelectronic.  Metal ions are isoelectronic with the preceding noble-gas atom, while non-metal ions have the electron configuration of next noble gas atom.