A nanoparticle is 2.5 × 10-9 m wide. A speck of dust is 2.5 × 10-5 m wide.
How many times wider is the speck of dust compared to the nanoparticle?
100
1000
10 000
100 000
48 exam-style questions on OCR GCSE Chemistry Properties of materials. Each one has a worked solution and a mark scheme showing where the marks go.