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Bulk and surface properties of matter including nanoparticles

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Question 19

Zinc oxide nanoparticles are commonly used in sunscreens to block ultraviolet radiation while remaining transparent on the skin.

A cubic nanoparticle of zinc oxide has a side length of 8 nm8\text{ nm}8 nm. A larger cubic microparticle of zinc oxide has a side length of 2 μm2\ \mu\text{m}2 μm.

By what factor is the surface area to volume ratio (SA:VSA:VSA:V) of the nanoparticle greater than that of the microparticle?

250250250

62,50062,50062,500

15,625,00015,625,00015,625,000

0.250.250.25

Bulk and surface properties of matter including nanoparticles Questions

  1. GCSE
  2. /Chemistry
  3. /Bulk and surface properties of matter including nanoparticles

Practise Edexcel GCSE Chemistry Bulk and surface properties of matter including nanoparticles with exam-style questions for Foundation and Higher tier. 63 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank