Chapter 4.10, Problem 1QQ

Interpretation Introduction

Interpretation:

Among the given options, the formula of a polyatomic ion has to be chosen.

Concept Introduction:

Ions are categorized into two types they are monoatomic ions and polyatomic ions.  A monoatomic ion is an ion formed by a single atom through loss or gain of electrons.

Example: ${\text{Cl}}^{\text{-}}$

A polyatomic ion is a group of atoms that stays together and has an overall ionic charge.

Example: ${\text{NO}}_{\text{3}}^{\text{-}}$