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1.2 Atomic structure

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Question 22
H

An atom of gold, 79197Au{}^{197}_{79}\mathrm{Au}79197​Au, contains 79 protons, 118 neutrons and 79 electrons.

Use the approximate relative masses of protons, neutrons and electrons.

What percentage of the mass of the atom is in the nucleus?

[1]
A

71.38%

B

99.80%

C

99.98%

D

100.00%

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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