Some people are worried about using cosmetics that contain nanoparticles.
Which is the best reason for this worry?
Nanoparticles may pass into cells and their effects are not known
Nanoparticles cost more than fine particles of the same material
Nanoparticles are made of the same material as the fine particles
Nanoparticles are needed in smaller quantities than fine particles
40 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.