(a(i))[1]
Identify the substance, D, E, F, G, H or I, which is liquid at 25^{\circ}C.
(a(ii))[1]
Identify the substance, D, E, F, G, H or I, which is a gas at 25^{\circ}C.
(a(iii))[1]
Identify the substance, D, E, F, G, H or I, which is a solid made up of simple molecules at 25^{\circ}C.
(b)[2]
Identify the substance, D, E, F, G, H or I, which is a metal. Give a reason for your choice.
(c)[3]
Identify the substance, D, E, F, G, H or I, which has a macromolecular structure. Give two reasons for your choice.
(d)[2]
Identify the substance, D, E, F, G, H or I, which is an ionic solid. Give a reason for your choice.