O-LevelChemistryAtomic Structure5070/12 · May/June 2023 · Q31 Mark

Naturally occurring bromine has a relative atomic mass of 80 and consists entirely of two isotopes of relative atomic masses 79 and 81. What can be deduced about naturally occurring bromine from this information only?

ABromine contains the two isotopes in equal proportions.

BBromine has different oxidation states.

CBromine isotopes have different numbers of protons.

DBromine is radioactive.

✓ Correct answer

A: Bromine contains the two isotopes in equal proportions.

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2023 Paper 1 Variant 2, question 3.

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