DP Chemistry (first assessment 2025)
Question 21N.1A.HL.TZ0.5
Date | November 2021 | Marks available | [Maximum mark: 1] | Reference code | 21N.1A.HL.TZ0.5 |
Level | HL | Paper | 1A | Time zone | TZ0 |
Command term | State | Question number | 5 | Adapted from | N/A |
5.
[Maximum mark: 1]
21N.1A.HL.TZ0.5
Consider the mass spectrum of an element:
What is the relative atomic mass of this element?
A. 10.2
B. 10.5
C. 10.8
D. 10.9
[1]
Markscheme
C
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.