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Nanotechnology
Silver nanoparticles are added to socks to stop them smelling.

Nanotechnology

Nanoparticles can behave differently from bulk materials. This GCSE Chemistry quiz explores surface area, catalysts, and how nanotechnology is used in products, medicine, and materials.

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Fascinating Fact:

Some nanoparticles are used as catalysts, because more surface is available for reactions. This can speed up reactions without the catalyst being used up.

In GCSE Chemistry, nanotechnology focuses on particles between 1 and 100 nanometres and why size matters. You learn how a larger surface area to volume ratio can change reactivity, usefulness, and potential risks in everyday applications.

  • Nanoparticle: A tiny particle with at least one dimension between 1 and 100 nanometres.
  • Surface area to volume ratio: A comparison showing how much surface an object has compared with its volume, which affects how it reacts.
  • Nanometre (nm): A unit of length equal to one billionth of a metre, used to measure extremely small sizes.
What is nanotechnology in GCSE Chemistry?

Nanotechnology in GCSE Chemistry is the use of materials made from nanoparticles, which are 1 to 100 nm in size. Their properties can differ from bulk materials because of their very large surface area to volume ratio.

Why do nanoparticles have different properties from bulk materials?

Nanoparticles can have different properties because so much of the material is at the surface. This can affect reactivity, melting point, strength, and how light interacts with the particles.

What are the risks of nanoparticles in Chemistry?

Some nanoparticles may enter the body through inhalation or the skin and their long-term effects are not always known. Because they are so small, they can travel into tissues more easily than larger particles.

1 .
Why are nanoparticles used in tennis rackets?
To make them lighter and stronger
To make them faster and more accurate
To make them faster and lighter
To make them more accurate and stronger
Nanoparticles are used commercially in other sporting equipment such as golf clubs
2 .
The surface area to volume ratio for nanoparticles is...
much greater than for larger particles
much smaller than for larger particles
the same as larger particles
there is no difference if the particle is the same substance
This could make them useful as catalysts because one of the factors that increases the rate of a chemical reaction is to increase the surface area
3 .
Why are silver nanoparticles added to socks?
They prevent socks getting taken by the sock monster
They help the socks absorb moisture
They stop the socks from smelling
They make the socks lighter
Silver nanoparticles are antibacterial so they prevent bacteria causing a smell
4 .
What size of particles does nanoscience deal with?
1 - 100nm
100 - 1,000nm
1,000 - 100,000nm
1,000,000 - 10,000,000nm
In comparison, a human hair is approximately 60,000nm
5 .
Which of the following properties does NOT change when dealing with nanoparticles of a substance?
Melting point
Sensitivity to light
Atomic structure
Intermolecular forces
The substance is still made of the same atoms, only the number of them changes
6 .
Why might nanotubes be useful as drug delivery systems?
They are expensive
They are strong
They are light
They are hollow
Experiments on insects have shown that this method of delivering drugs is possible
7 .
Nanoparticles are measured in...
metres
millimetres
nanometres
centimetres
Nanometres = nm, 1 nm = 1 x 10-9m
8 .
What is nanotechnology?
The manipulation of matter with an ipod nano
The manipulation of matter on an atomic level
The manipulation of matter on a macromolecular level
The manipulation of matter on a huge scale
'Nano' is from the Greek word 'nanos' meaning dwarf
9 .
Which of the following is NOT a current use for nanoparticles?
Sports equipment
Weapons
Clothing
Sun creams
It is possible that nanotechnology could be used to produce extremely dangerous weapons in the future
10 .
Some people are concerned that nanoparticles could be...
too small to be able to manipulate
too small to be of any use
too small to see
toxic to humans
Some people believe that there should be much more testing before nanoparticles are used in humans
You can find more about this topic by visiting BBC Bitesize - Nanoscience

Author:  Kate Gardiner (Chemistry Educator & GCSE Quiz Writer)

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