1 markParticles are grouped into categories depending on their diameter.
Particle X has a diameter of 2.5 x 10-7 m.
Which particle is this most likely to be?
Coarse particles
Fine particles
Nanoparticles
Dust particles
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1 markA nanoparticle of a metal oxide is a cube.
Each side has a length of 82 nm.
What is the volume of the nanoparticle?
6.72 x 103 nm3
5.51 x 105 nm3
5.51 x 10-5 nm3
6.72 x 10-3 nm3
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1 markA gold nanoparticle is a cube with sides of 2 nm.
What is the simplest surface area to volume ratio of the nanoparticle?
24: 8
12:3
16:1
3:1
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Which of the following is not a use of nanoparticles?
Drug delivery to cells
Extracting iron from its ore
Producing suncreams
Catalysts
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Nanoparticles are used in medicine, and can be used to deliver drugs to the cells where they are needed.
Some people are concerned about using nanoparticles this way.
What is the main reason for this concern?
The potential cost of this technology to the National Health Service
Limited information to patients on which treatments nanoparticles are used for
The unknown effect of nanoparticles on long term health
Money could be spent on other areas of medicine that affect a greater proportion of the population
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