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5.1 The nuclear model of the atom

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Question 152

A sodium nuclide is represented by the symbol shown.

1123Na {}^{23}_{11}\text{Na} 1123​Na

Which statements about a nucleus of this sodium nuclide are correct?

  1. The nucleon number is 23.
  2. The proton number is 12.
  3. The nucleus contains 12 neutrons.
A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2, and 3

Markscheme

5.1 The nuclear model of the atom Questions

  1. IGCSE
  2. /Physics
  3. /5.1 The nuclear model of the atom

284 exam-style questions on CIE IGCSE Physics 5.1 The nuclear model of the atom, covering 5.1.1a Structure of the atom and ions, 5.1.1b Alpha-particle scattering, 5.1.2a Composition of the nucleus and isotopes, 5.1.2b Proton number, nucleon number and nuclide notation, and 5.1.2c Nuclear fission and nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.

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