A-LevelChemistryAtomic structure9701/12 · Feb/Mar 2021 · Q11 Mark

The table shows the numbers of protons, neutrons and electrons in four different particles, W, X, Y, and Z. number of protons number of neutrons number of electrons W 32 40 32 X 32 40 34 Y 32 42 32 Z 34 40 34 Which pair represents the atoms of two isotopes of the same element?

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AW and Y

BW and Z

CX and Y

DX and Z

✓ Correct answer

A: W and Y

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Topic: Atomic structure, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2021 Paper 1 Variant 2, question 1.

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