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5.1 The nuclear model of the atom

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Question 129

A nuclide of potassium is represented by 1940K^{40}_{19}\text{K}1940​K. Which row gives the number and location of the electrons in an atom of 1940K^{40}_{19}\text{K}1940​K?

A

19 electrons, in the nucleus

B

19 electrons, surrounding the nucleus

C

21 electrons, in the nucleus

D

21 electrons, surrounding the nucleus

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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