#C2.4.1
use chemical symbols to write the formulae of elements and simple covalent and ionic compounds
#C2.4.2
use the formulae of common ions to deduce the formula of Group 1 and Group 7 compounds
#C2.4.3
use the names and symbols of the first 20 elements, Groups 1, 7 and 0 and other common elements from a supplied Periodic Table to write formulae and balanced chemical equations where appropriate
#C2.4.4
describe the physical states of products and reactants using state symbols (s, l, g and aq)