DP Chemistry (last assessment 2024)
Question 22M.2.hl.TZ1.e(iv)
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.2.hl.TZ1.e(iv) |
| Level | hl | Paper | 2 | Time zone | TZ1 |
| Command term | Justify, Suggest | Question number | e(iv) | Adapted from | N/A |
e(iv).
[Maximum mark: 1]
22M.2.hl.TZ1.e(iv)
When heated in air, magnesium ribbon reacts with oxygen to form magnesium oxide.
Most nitride ions are 14N3–.
Suggest, giving a reason, whether magnesium or nitrogen would have the greater sixth ionization energy.
[1]
Markscheme
nitrogen AND electron lost from first «energy» level/s sub-level/s-orbital AND magnesium from p sub-level/p-orbital/second «energy» level
OR
nitrogen AND electron lost from lower level «than magnesium» ✔
Accept “nitrogen AND electron lost closer to the nucleus «than magnesium»”.
Examiners report
Common error in suggesting nitrogen would have the greater sixth ionization energy was that for nitrogen, electron is lost from first energy level without making reference to magnesium losing it from second energy level.
