DP Chemistry (last assessment 2024)
Question 22M.2.sl.TZ1.1g
| Date | May 2022 | Marks available | [Maximum mark: 4] | Reference code | 22M.2.sl.TZ1.1g |
| Level | sl | Paper | 2 | Time zone | TZ1 |
| Command term | Outline, State | Question number | g | Adapted from | N/A |
g.
[Maximum mark: 4]
22M.2.sl.TZ1.1g
When heated in air, magnesium ribbon reacts with oxygen to form magnesium oxide.
(g)
State the types of bonding in magnesium, oxygen and magnesium oxide, and how the valence electrons produce these types of bonding.
[4]
Markscheme
Award [1] for all bonding types correct.
Award [1] for each correct description.
Apply ECF for M2 only once.
Examiners report
About a quarter of the students gained full marks and probably a similar number gained no marks. Metallic bonding was the type that seemed least easily recognised and least easily described. Another common error was to explain ionic bonding in terms of attraction of ions rather than describing electron transfer.
