DP Chemistry (last assessment 2024)
Question 21M.2.sl.TZ2.a(i)
| Date | May 2021 | Marks available | [Maximum mark: 2] | Reference code | 21M.2.sl.TZ2.a(i) |
| Level | sl | Paper | 2 | Time zone | TZ2 |
| Command term | Explain | Question number | a(i) | Adapted from | N/A |
a(i).
[Maximum mark: 2]
21M.2.sl.TZ2.a(i)
The properties of elements can be predicted from their position in the periodic table.
Explain why Si has a smaller atomic radius than Al.
[2]
Markscheme
nuclear charge/number of protons/Z/Zeff increases «causing a stronger pull on the outer electrons» ✓
same number of shells/«outer» energy level/shielding ✓
