Ternary Ionic Cation & Anion electrostatically held together –at least one of the ions is a polyatomic ion. two or more atoms chemically bonded together with a charge – most are negative. –Polyatomic ions are listed on the back of the PT.
Create compounds Same as for binary ionic –Method 1 – balance e - transferred –Method 2 – LCM –Method 3 – Crossover Treat polyatomic ions as ONE unit –If you need more than one polyatomic ion, use parenthesis so subscript applies to all.
Naming Same as binary ionic –Name the cation, name the anion