Question 22M.2.hl.TZ1.g
| Date | May 2022 | Marks available | [Maximum mark: 4] | Reference code | 22M.2.hl.TZ1.g |
| Level | hl | Paper | 2 | Time zone | TZ1 |
| Command term | Outline, State | Question number | g | Adapted from | N/A |
When heated in air, magnesium ribbon reacts with oxygen to form magnesium oxide.
State the types of bonding in magnesium, oxygen and magnesium oxide, and how the valence electrons produce these types of bonding.
[4]
Award [1] for all bonding types correct.
Award [1] for each correct description.
Apply ECF for M2 only once.
One teacher commented that not asking to describe bonding in terms of electrostatic attractions as in earlier papers would have been confusing and some did answer in terms of electrostatic forces of attractions involved. However, the question was clear in its expectation that the answer had to be in terms of how the valence electrons produce the three types of bonds and the overall performance was good. Some had difficulty identifying the bond type for Mg, O2 and MgO.
