DP Chemistry (last assessment 2024)
Question 19M.3.hl.TZ1.a(i)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.hl.TZ1.a(i) |
| Level | hl | Paper | 3 | Time zone | TZ1 |
| Command term | Write | Question number | a(i) | Adapted from | N/A |
a(i).
[Maximum mark: 1]
19M.3.hl.TZ1.a(i)
Uranium-235, 235U, is bombarded with a neutron causing a fission reaction.
Two products of the fission of 235U are 144Ba and 89Kr.
Write the nuclear equation for this fission reaction.
[1]
Markscheme
235U + 1n → 144Ba + 89Kr + 31n [✔]
Examiners report
Required candidates to write a nuclear equation for a fission reaction with the question indicating that 235U was bombarded with a neutron to produce 144Ba and 89Kr. Despite this, some candidates did not include the initial neutron or omitted neutrons completely.
