O-LevelChemistryAtomic Structure5070/11 · May/June 2014 · Q21 Mark

A radioactive isotope of carbon has more nucleons than the non-radioactive isotope, ¹²C. How many protons, neutrons and electrons could there be in this radioactive isotope of carbon?

Aprotons: 6, neutrons: 6, electrons: 6

Bprotons: 6, neutrons: 8, electrons: 6

Cprotons: 8, neutrons: 6, electrons: 8

Dprotons: 8, neutrons: 8, electrons: 8

✓ Correct answer

B: protons: 6, neutrons: 8, electrons: 6

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2014 Paper 1 Variant 1, question 2.

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