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6 Radioactivity

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Question 3

An ion has an overall relative charge of +1. It contains 18 electrons and 20 neutrons.

Which gives the atomic number and the mass number of the nucleus in this ion?

[1]
A

atomic number 19 and mass number 39

B

atomic number 19 and mass number 37

C

atomic number 17 and mass number 37

D

atomic number 18 and mass number 38

Markscheme

6 Radioactivity Questions

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

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