O-LevelChemistryAtomic Structure5070/12 · Oct/Nov 2019 · Q31 Mark

The nucleon number of an atom is typically greater than its proton number. The difference between these two numbers indicates the number of .....1.... in the atom. Atoms that have different nucleon numbers but the same proton number are called ......2...... . Which words correctly complete gaps 1 and 2?

A1: electrons, 2: isomers

B1: electrons, 2: isotopes

C1: neutrons, 2: isomers

D1: neutrons, 2: isotopes

✓ Correct answer

D: 1: neutrons, 2: isotopes

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 2, question 3.

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