topic 9 the periodic table: chemical periodicity

9.1.2 explain the variation in melting point and electrical conductivity in terms of the structure and bonding of

the elements

9.2.4 describe, explain, and write equations for, the acid / base behaviour of the oxides Na2O, MgO, Al 2O3,

P4O10, SO2 and SO3 and the hydroxides NaOH, Mg(OH)2 and Al (OH)3 including, where relevant,

amphoteric behaviour in reactions with acids and bases (sodium hydroxide only)

describe, explain, and write equations for, the reactions of the chlorides NaCl, MgCl 2, Al Cl 3, SiCl 4, PCl 5

with water including the likely pHs of the solutions obtained

9.2.6 explain the variations and trends in 9.2.2, 9.2.3, 9.2.4 and 9.2.5 in terms of bonding and electronegativity