which statement is true about nanoparticles?

Their properties are usually different from the substance

Why are titanium dioxide particles used in sunblock creams

They block UV light but do not reflect visible light.

atoms on the surface material are:

more reactive than atoms in the centre

Why is there concern about nanoparticles and human health

They are so small they can enter the body through skin

Why might you decide to wear sun screen despite the risks of nanoparticles being absorbed

because you don't want skin cancer, because the nano particles clump together, both of the above

How might buckyballs NOT be good as a drug delivery system

Might interfere with DNA strands and self repair

Which statement about nanoparticles is true?

They have a large surface area compared to their volume

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Nanoparticle applications

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Answers

1
which statement is true about nanoparticles?
Nanoparticles can be seen with a light microscope
Their properties are usually the same as the bulk substance
Their properties are usually different from the substance
2
Why are titanium dioxide particles used in sunblock creams
They block UV light but do not reflect visible light.
They block visible light, but let UV light through
They give your skin white streaks that make you look cool
3
atoms on the surface material are:
less reactive than atoms in the centre
more reactive than atoms in the centre
The same reactivity as atoms in the centre
4
Why is there concern about nanoparticles and human health
They are so small they can enter the body through skin
They can make you run faster
They can disrupt your brain patterns
They can cause climate change
5
Why might you decide to wear sun screen despite the risks of nanoparticles being absorbed
because you don't want skin cancer
neither of the above
because the nano particles clump together
both of the above
6
How might buckyballs NOT be good as a drug delivery system
Cannot be guided to the correct location to deliver drugs
Might interfere with DNA strands and self repair
They can accumulate in important organs
7
Which properties of nanoparticles make them useful for sports equipment?
Increase stiffness
Brittle
Cause more vibrations
Conduct electricity
8
Silver has antibacterial properties. which of these products has silver NOT been added to
Socks
tyres
sports wear
Bandages
9
What are nanoparticles measured in?
mm
μm
cm
nm
10
Which statement about nanoparticles is true?
They have a small surface area compared to their volume
They have a large surface area compared to their volume
They are always inorganic compounds such as titanium dioxide

Nanoparticle applications Flashcards | StudBud