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5.1 The nuclear model of the atom

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Question 196

A nuclide of the element potassium has the symbol shown:

1939K {}^{39}_{19}\text{K} 1939​K

What does a neutral atom of this nuclide contain?

A

19 protons, 20 neutrons, 19 electrons

B

19 protons, 39 neutrons, 20 electrons

C

20 protons, 19 neutrons, 39 electrons

D

39 protons, 19 neutrons, 20 electrons

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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