use chemical symbols to write the formulae of elements and simple covalent and ionic compounds
use chemical symbols to write the formulae of elements and simple covalent and ionic compounds
use the formulae of common ions to deduce the formula of Group 1 and Group 7 compounds
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
describe the physical states of products and reactants using state symbols (s, l, g and aq)