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1.2 Atomic structure

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Question 3

A science museum display contains a model nucleus made from 30 spheres representing protons and 40 spheres representing neutrons.

What is the mass number of the atom that this model nucleus represents?

[1]
A

70

B

40

C

10

D

30

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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