DP Chemistry (last assessment 2024)
Question 21N.2.hl.TZ0.2a
| Date | November 2021 | Marks available | [Maximum mark: 2] | Reference code | 21N.2.hl.TZ0.2a |
| Level | hl | Paper | 2 | Time zone | TZ0 |
| Command term | Explain | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
21N.2.hl.TZ0.2a
Electron transitions are related to trends in the periodic table.
(a)
Explain the general increase in trend in the first ionization energies of the period 3 elements, Na to Ar.
[2]
Markscheme
increasing number of protons
OR
increasing nuclear charge ✔
«atomic» radius/size decreases
OR
same number of shells/electrons occupy same shell
OR
similar shielding «by inner electrons» ✔
