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2.4 Bulk and surface properties of matter including nanoparticles

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Question 41

A computer model represents particles of a substance used in an electronic component. The model assumes that the atoms are touching in a straight line through the centre of each particle.

Particle A has a diameter of 4.8 × 10-8 m. The model predicts that 320 atoms fit in a line across its diameter.

a.

Calculate the diameter of one atom in nm\text{nm}nm.

[2]
b.

Particle B is made of the same substance. The model predicts that 700 atoms fit in a line across its diameter.

Calculate the diameter of particle B.

Explain whether particle B is a nanoparticle.

[2]
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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