DP Chemistry (last assessment 2024)
Question 18N.2.sl.TZ0.4a
| Date | November 2018 | Marks available | [Maximum mark: 2] | Reference code | 18N.2.sl.TZ0.4a |
| Level | sl | Paper | 2 | Time zone | TZ0 |
| Command term | Explain | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
18N.2.sl.TZ0.4a
Properties of elements and their compounds can be related to the position of the elements in the periodic table.
(a)
Explain the decrease in atomic radius from Na to Cl.
[2]
Markscheme
nuclear charge/number of protons/Zeff increases «causing a stronger pull on the outer electrons» ✔
same number of shells/«outer» energy level/shielding ✔
Accept “atomic number” for “number of protons”.
