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6 Radioactivity

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Question 105
H

A nucleus has mass number 45 and relative charge +21. Its atom loses three electrons to form an ion.

Which gives the numbers of neutrons and electrons in the ion?

[1]
A

21 neutrons and 18 electrons

B

18 neutrons and 24 electrons

C

24 neutrons and 24 electrons

D

24 neutrons and 18 electrons

Markscheme

6 Radioactivity Questions

  1. GCSE
  2. /Physics
  3. /6 Radioactivity

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