How To Write Names And Formulas Of Ternary Ionic Compounds . Examples of ternary ionic compounds. Memorization of several positive and negative polyatomic ions, (two or. Bonding Ionic Bonding Revision Notes in A Level and IB Chemistry from getrevising.co.uk The cation is named first, followed by the anion. Na + = sodium mg 2+ = magnesium al 3+ = aluminum; Most of these compounds involve bonding with polyatomic cations and polyatomic anions.