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6.1 Atomic structure and isotopes

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Question 2

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

6.1 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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