Ionic formulae

Ion

atom or group of atoms that has a positive or negative charge

Polyatomic ion

An ion made of two or more atoms

Ionic compound

A compound that consists of positive and negative ions

Formation of ionic compounds

Metal gives electron(s) to non-metals

Ionic formula

The simplest whole number ratio of the ions which form a neutral ionic compound

Charges in an Ionic Compound

Cancel one another out

Hydroxide ion

OH-

Carbonate ion

CO₃ ^2-

Nitrate ion

NO₃^-

Ammonium ion

NH₄⁺

(s)

Solid

(l)

Liquid

(g)

Gas

(aq)

Aqueous