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Lesson Worksheet: Nanoparticles Chemistry
In this worksheet, we will practice identifying nanoparticles, describing their properties and uses.
How many atoms does a single nanoparticle typically contain?
- AA few thousand
- BLess than ten
- CA few hundred
- DBetween ten and one hundred
- ETens of thousands
A nanoparticle is shaped like a cube with sides 20 nm in length. What is the surface-area-to-volume ratio?
Which of the following reasons could explain why 1 g of gold nanoparticles are a better catalyst than 1 g of solid gold metal?
- AThe nanoparticles have a smaller mass.
- BThe nanoparticles have a larger surface area.
- CThe nanoparticles have a smaller surface area.
- DThe nanoparticles have a greater mass.
- EThe nanoparticles have a larger volume.
Nanoparticles are used in sun cream. Which of the following reasons is not an advantage of adding nanoparticles to sun creams?
- ANanoparticles in sun creams are absorbed deeper into the skin and provide longer protection.
- BNanoparticles in sun creams may be washed away into the environment.
- CNanoparticles in sun creams result in a transparent liquid.
- DNanoparticles in sun creams give better skin coverage.
- ENanoparticles in sun creams provide better protection against UV rays.
Which of the following statements about nanoparticles is correct?
- ANanoparticles have a low surface-area-to-volume ratio.
- BNanoparticles cannot be used as catalysts.
- CNanoparticles cannot form a transparent layer.
- DNanoparticles pose no risks to the environment.
- ENanoparticles can be used as an antibacterial agent.
What is the diameter, in meters, of the nanoparticle in the diagram?
- A m
- B m
- C m
- D m
- E m
Which of the following statements could not be used to describe nanoparticles?
- AParticles with a high surface-area-to volume ratio
- BParticles 1–100 nm in size
- CParticles that are smaller than most atoms
- DParticles with different properties than those of the same material in bulk
- EParticles containing a few hundred atoms or ions