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1.2 Atomic structure

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Question 19

An atom of fluorine-19 has a nucleus made of 9 protons and 10 neutrons, with 9 electrons in shells around the nucleus.

Use the approximate relative mass of each subatomic particle.

What percentage of the atom's total relative mass is outside the nucleus?

[1]
A

0.0237%

B

47.3572%

C

99.9763%

D

0.0045%

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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