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Date November 2020 Marks available 1 Reference code 20N.1.sl.TZ0.6
Level SL Paper 1 Time zone TZ0
Command term State Question number 6 Adapted from N/A

Question

What is the maximum number of electrons that can occupy the 4th main energy level in an atom?

A.  8

B.  14

C.  18

D.  32

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

Core » Topic 2: Atomic structure » 2.2 Electron configuration
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