(a(i))[2]
Explain why the values of both lines rise steadily down the group.
(a(ii))[2]
State and explain which line stands for the atomic radii and which stands for the ionic radii.
(b(i))[1]
Identify the anion contained in salt L.
(b(ii))[1]
Identify element $M$ and write an ionic equation for how the white precipitate forms with sulfuric acid.
(b(iii))[2]
Give the formula of salt $L$ and use it to write an equation for its thermal decomposition.
(c(i))[2]
Write ionic equations for acid neutralisation by calcium hydroxide and by calcium carbonate.
(c(ii))[2]
Suggest and explain why calcium carbonate is preferable to calcium hydroxide for this use in regions of high rainfall.
(d)[2]
Give the formula of the magnesium-containing product formed when magnesium reacts: with cold water; with steam.