A quality-control technician checks the sizes of particles of a solid. An atom of the solid has a diameter of 0.12 nm0.12\ \text{nm}0.12 nm. One particle has a diameter of 3.6 × 10-8 m.
Calculate approximately how many atom diameters span the diameter of the particle.
A second particle of the same solid is 20 atoms across.
Calculate the diameter of the second particle in nanometres.
Use your answer to explain whether the second particle is a nanoparticle.
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.