DP Chemistry (last assessment 2024)
Question 19M.3.hl.TZ1.24b(ii)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.hl.TZ1.24b(ii) |
| Level | hl | Paper | 3 | Time zone | TZ1 |
| Command term | Outline | Question number | b(ii) | Adapted from | N/A |
b(ii).
[Maximum mark: 1]
19M.3.hl.TZ1.24b(ii)
Technetium-99m, a widely used radionuclide, has a half-life of 6.0 hours and undergoes gamma decay to technetium-99.
Most of the nuclear waste generated in a hospital is low-level waste (LLW).
(b(ii))
Outline the disposal of LLW.
[1]
Markscheme
stored in shielded containers until radiation level drops «to a safe level» [✔]
Examiners report
Outlining the disposal of LLW was also challenging with many candidates saying that it should be put in a container without saying the container should be shielded.
