DP Chemistry (last assessment 2024)
Question 18N.3.sl.TZ0.3a
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.3.sl.TZ0.3a |
| Level | sl | Paper | 3 | Time zone | TZ0 |
| Command term | State | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 1]
18N.3.sl.TZ0.3a
The presence of very small amounts of lead in calcium-based antacids can be determined using inductively coupled plasma-mass spectroscopy (ICP-MS).
(a)
State the type of particle present in the plasma formed.
[1]
Markscheme
positive ions/cations/Pb2+
OR
free electrons ✔
Accept “ions” OR “charged species/particle”.
