DP Chemistry (first assessment 2025)
Question 21M.2.SL.TZ1.b(ii)
| Date | May 2021 | Marks available | [Maximum mark: 2] | Reference code | 21M.2.SL.TZ1.b(ii) |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | State | Question number | b(ii) | Adapted from | N/A |
b(ii).
[Maximum mark: 2]
21M.2.SL.TZ1.b(ii)
State the number of protons, neutrons and electrons in each species.
[2]
Markscheme
Award [1 max] for 4 correct values.
Syllabus sections
Structure 1. Models of the particulate nature of matter » Structure 1.2—The nuclear atom » Structure 1.2.1 - Atoms and negatively charged electrons. Atoms contain a positively charged, dense nucleus composed of protons and neutrons (nucleons). Negatively charged electrons occupy the space outside the nucleus. Use the nuclear symbol ZXA to deduce the number of protons, neutrons and electrons in atoms and ions.