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6.1 Atomic structure and isotopes

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Question 33
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

6.1 Atomic structure and isotopes Questions

  1. GCSE
  2. /Physics
  3. /6.1 Atomic structure and isotopes

103 exam-style questions on Edexcel GCSE Physics 6.1 Atomic structure and isotopes, covering 6.1.1 Structure of the atom, 6.1.2 Isotopes: atomic and mass number, 6.1.3 Sub-atomic particles: masses and charges, and 6.1.4 Electron orbits and energy changes. Each one has a worked solution and a mark scheme showing where the marks go.

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