Nanoparticles and scale
Nanoparticles and scale
A nanoparticle is a particle between about 111 and 100 nm100 \, \text{nm}100nm across. An atom is roughly 0.1 nm0.1 \, \text{nm}0.1nm across, so a nanoparticle is much larger than an atom but much smaller than a speck of dust.
Step-by-step lessons on Edexcel GCSE Chemistry 10.5 Bulk and surface properties of matter including nanoparticles, covering 10.5.1 Nanoparticles: size, uses and risks and 10.5.2 Comparing and selecting materials. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.