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1.1 The particle model

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Question 29

Two different substances are heated. The table describes their particles before and after heating.

ProcessBefore heatingAfter heating
PParticles each made of two atoms of element A, packed closely in fixed positionsParticles each made of two atoms of element A, far apart and moving randomly
QParticles each made of one atom of element D joined to two atoms of element EParticles of element D, and separate particles each made of two atoms of element E

Explain whether each process is a physical change or a chemical change.

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Markscheme

1.1 The particle model Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 The particle model

93 exam-style questions on OCR GCSE Chemistry 1.1 The particle model, covering 1.1.1 The particle model and changes of state and 1.1.2 Limitations of the particle model. Each one has a worked solution and a mark scheme showing where the marks go.

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