NAMING IONIC COMPOUNDS
name the cations
note that the names of transition metal and some main group cations must include their charge as a Roman numeral
name the anions: end with -ide
the name of compound is cation name followed by anion name
Na2S contains sodium ion and sulphide ion. The compound is sodium sulphide.
SnCl4contains a tin cation and four chloride ions. Each chloride carries a -1 charge, so the tin must have a +4 charge. The compound is tin(IV) chloride.