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1.2 Atomic structure

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Question 2

An ion of element Q is represented by 1531Q3−{}^{31}_{15}\mathrm{Q}^{3-}1531​Q3−.

a.

Calculate the percentage of the total relative mass of the ion that is in its nucleus, using the approximate relative mass of each type of subatomic particle.

Give your answer to two decimal places.

[4]
b.

Compare the percentage of the mass in the nucleus of a neutral atom of Q with the percentage for the ion.

Explain your answer.

[2]
Markscheme

1.2 Atomic structure Questions

  1. GCSE
  2. /Chemistry
  3. /1.2 Atomic structure

101 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.

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