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4.1 Atoms and isotopes

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Question 14
F

A neutral atom of potassium has 19 electrons. A potassium ion has a charge of one plus. How many electrons does the potassium ion have?

[1]
A

18

B

19

C

20

D

38

Markscheme

4.1 Atoms and isotopes Questions

  1. GCSE
  2. /Physics
  3. /4.1 Atoms and isotopes

40 exam-style questions on AQA GCSE Physics 4.1 Atoms and isotopes, covering 4.1.1 The structure of an atom, 4.1.2 Mass number, atomic number and isotopes, and 4.1.3 The development of the model of the atom (common content with chemistry). Each one has a worked solution and a mark scheme showing where the marks go.

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