the writing of formulae of ionic compounds from ionic charges, including:

(i) prediction of ionic charge from the position of an element in the periodic table
(ii) recall of the names and formulae for the following ions: NO₃^–, CO₃^2–, SO₄^2–, OH^–, NH₄⁺, Zn²⁺ and Ag⁺

Note that ‘nitrate’ and ‘sulfate’ should be assumed to be NO₃^– and SO₄^2–.
Charges on ions other than in (i) and (ii) will be provided.

construction of balanced chemical equations (including ionic equations), including state symbols, for reactions studied and for unfamiliar reactions given appropriate information.