JC TEST ON CHEMICAL FORMULA INVOLVING ONLY 2 ELEMENTS

Give the formula of the compound formed when hydrogen and sulphur chemically combine.

Give the formula of the compound formed when carbon and oxygen chemically combine.

Give the formula for ammonia. Ammonia is formed when nitrogen chemically combines with hydrogen.

Give the formula of the compound formed when carbon chemically combines with chlorine.

Give the formula of the compound formed when sodium reacts with oxygen.

Give the formula of the compound formed when silicon reacts with oxygen.

Give the formula of the compound formed when hydrogen chemically combines with oxygen. This compound covers 2/3 of the earths surface.

Give the formula of the compound that is formed when aluminium burns in air. This compound contains the elements aluminium and oxygen.

Give the formula of the compound formed when potassium and oxygen chemically combined.

Give the formula of the compound that is formed when calcium chemically combines with nitrogen. Calcium has a valency of two because it is in group 2 and nitrogen has a valency of three because it is in group 5.