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1.2 Atomic structure

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Question 4

An atom contains 20 electrons. The mass of the atom is about 40 times the mass of a hydrogen atom. The mass of one electron is about 1/2000 of the mass of a hydrogen atom.

Calculate the percentage of the atom's mass that is due to particles other than electrons.

Give your answer to 2 decimal places.

[3]
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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