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1.2 Atomic structure

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Question 42
F

An atom of potassium has an atomic number of 19 and a mass number of 39.

How many neutrons are in the nucleus of this atom?

[1]
A

58

B

39

C

20

D

19

Markscheme

1.2 Atomic structure Questions

  1. GCSE
  2. /Chemistry
  3. /1.2 Atomic structure

101 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.

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