DP Chemistry (last assessment 2024)
Question 19M.3.hl.TZ1.24b(i)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.hl.TZ1.24b(i) |
| Level | hl | Paper | 3 | Time zone | TZ1 |
| Command term | Outline | Question number | b(i) | Adapted from | N/A |
b(i).
[Maximum mark: 1]
19M.3.hl.TZ1.24b(i)
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(i))
Outline what is meant by low-level waste.
[1]
Markscheme
small/low amounts of radiation AND for a short time [✔]
Note: Accept “weakly ionizing radiation” instead of “small amounts of radiation”.
Accept “short half-lives” instead of “for a short time”.
Examiners report
Low level nuclear waste was poorly outlined with many superficial responses. Many candidates only gave half the required answer.
