DP Chemistry (last assessment 2024)
Question 21M.2.hl.TZ2.2b(i)
| Date | May 2021 | Marks available | [Maximum mark: 2] | Reference code | 21M.2.hl.TZ2.2b(i) |
| Level | hl | Paper | 2 | Time zone | TZ2 |
| Command term | State | Question number | b(i) | Adapted from | N/A |
b(i).
[Maximum mark: 2]
21M.2.hl.TZ2.2b(i)
The properties of elements can be predicted from their position in the periodic table.
(b(i))
State the condensed electron configurations for Cr and Cr3+.
[2]
Markscheme
Cr:
[Ar] 4s13d5 ✓
Cr3+:
[Ar] 3d3 ✓
Accept “[Ar] 3d54s1”.
Accept “[Ar] 3d34s0”.
Award [1 max] for two correct full electron configurations “1s22s22p63s23p64s13d5 AND 1s22s22p63s23p63d3”.
Award [1 max] for 4s13d5 AND 3d3.