DP Chemistry (first assessment 2025)

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Question 22M.1A.HL.TZ2.6

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.1A.HL.TZ2.6
Level	HL	Paper	1A	Time zone	TZ2
Command term	Deduce	Question number	6	Adapted from	N/A

6.

[Maximum mark: 1]

22M.1A.HL.TZ2.6

What is the relative atomic mass of an element with the following mass spectrum?

A. 23

B. 24

C. 25

D. 28

[1]

Markscheme

B

Examiners report

69% of the candidates determined the relative atomic mass of the element from its mass spectrum.

Syllabus sections

Structure 1. Models of the particulate nature of matter » Structure 1.2—The nuclear atom » Structure 1.2.3—Mass spectra. Mass spectra are used to determine the relative atomic masses of elements from their isotopic composition. Interpret mass spectra in terms of identity and relative abundance of isotopes.