Naming and Writing Ionic Compounds with/without Polyatomic Ions

An ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. They typically form between metals and nonmetals.

The charge of aluminum ion (Al) is +3.

The charge of fluoride ion (F) is -1.

To determine the formula of an ionic compound, balance the total positive and negative charges of the ions to ensure the compound is neutral.

The formula for sodium sulfate is Na2SO4.

A polyatomic ion is a charged ion composed of two or more atoms covalently bonded, which can act as a single unit in chemical reactions.

The formula for magnesium hydroxide is Mg(OH)2.

The name of the compound with the formula CaCl2 is calcium chloride.

The charge of sulfate ion (SO4) is -2.

The formula for lithium phosphide is Li3P.