DP Chemistry (last assessment 2024)
Question 19M.3.sl.TZ2.11c
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.sl.TZ2.11c |
| Level | sl | Paper | 3 | Time zone | TZ2 |
| Command term | Determine | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 1]
19M.3.sl.TZ2.11c
This question is about nuclear reactions.
(c)
90Sr, a common product of fission, has a half-life of 28.8 years.
Determine the number of years for the activity of a sample of 90Sr to fall to one eighth () of its initial value.
[1]
Markscheme
86.4 «years» [✔]
Examiners report
This was a well answered question with most students solving for the number of years correctly.
