Chapter 21, Problem 4PS

Interpretation Introduction

Interpretation: The name and symbol for four monoatomic ions that has same electron configuration as argon has to be stated.

Concept introduction: A monoatomic ion consist of only one atom. Thus, it is formed from a single atom. The charge on the monoatomic ion can be both positive or negative. So it can be both cation or anion. Also, the magnitude of charge can be greater than $1$.

Monoatomic ions are formed either by loss of electrons or by gain of electrons. The monoatomic ions formed by loss of electrons are positively charged while the monoatomic ions formed by gain of electrons are negatively charged. They do so to attain noble gas configuration of the nearest noble gas element.