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2.4 Bulk and surface properties of matter including nanoparticles

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Question 44

A microscope line scan crosses 160 identical particles arranged in a straight row. The particles touch edge to edge and together span 8.8 × 10-6 m.

An atom in the particles has a diameter of 0.14 nm0.14\ \text{nm}0.14 nm.

a.

Calculate the approximate number of atoms across the diameter of one particle.

Give the number of atoms to 2 significant figures.

[3]
b.

Give the particle-size category of the particles.

[1]
Markscheme

2.4 Bulk and surface properties of matter including nanoparticles Questions

  1. GCSE
  2. /Chemistry
  3. /2.4 Bulk and surface properties of matter including nanoparticles

104 exam-style questions on AQA GCSE Chemistry 2.4 Bulk and surface properties of matter including nanoparticles, covering 2.4.1 Sizes of particles and their properties and 2.4.2 Uses of nanoparticles. Each one has a worked solution and a mark scheme showing where the marks go.

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