An atom of aluminium has a mass number of 27 and an atomic number of 13. Aluminium is used extensively in the Jamaican bauxite industry. How many neutrons are present in one atom of aluminium?

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Question

An atom of aluminium has a mass number of 27 and an atomic number of 13. Aluminium is used extensively in the Jamaican bauxite industry. How many neutrons are present in one atom of aluminium?

Accepted Answer

14 — Award 1 mark for correctly calculating neutrons = mass number − atomic number (27 − 13 = 14). C is incorrect — 13 is the number of protons. A is incorrect — 27 is the mass number, not the neutron count. B is incorrect — 40 is the sum of mass number and atomic number, which has no physical meaning.

Answer

14

Answer

40

Answer

27

Answer

13

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