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6.1 Atomic structure and isotopes

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Question 16
F

An atom of magnesium-24 is represented by 1224Mg{}^{24}_{12}\mathrm{Mg}1224​Mg. A neutral atom of another magnesium isotope contains two more neutrons.

Which gives the mass number and the number of electrons in the other atom?

[1]
A

Mass number 26; electrons 14

B

Mass number 24; electrons 14

C

Mass number 26; electrons 12

D

Mass number 14; electrons 12

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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