DP Chemistry (first assessment 2025)
Question 20N.1A.SL.TZ0.6
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.1A.SL.TZ0.6 |
| Level | SL | Paper | 1A | Time zone | TZ0 |
| Command term | State | Question number | 6 | Adapted from | N/A |
6.
[Maximum mark: 1]
20N.1A.SL.TZ0.6
What is the maximum number of electrons that can occupy the 4th main energy level in an atom?
A.
B.
C.
D.
[1]
Markscheme
D
Examiners report
Poorly answered questions from candidates in general. Only 38% of candidates could state the maximum number of electrons in the 4th principal energy level is 32, with the most common incorrect answer being 18.
Syllabus sections
Structure 1. Models of the particulate nature of matter » Structure 1.3—Electron configurations » Structure 1.3.3—The main energy level. The main energy level is given an integer number, n, and can hold a maximum of 2n2 electrons. Deduce the maximum number of electrons that can occupy each energy level.