Nanoparticles

Question 1

What is nanotechnology

Answer 1

The science of very small things

Question 2

What is a nanoparticle

Answer 2

A structure that is 1 - 100nm in size and contains a few hundred atoms

Question 3

Radius of atom

Answer 3

0.1nm or 1 x 10 to the power of -10

Question 4

Radius of nucleus

Answer 4

1 x 10 to the power of -14 or 1/10,000th of the size of an atom

Question 5

What gives nanoparticles their unique properties

Answer 5

Having a large surface area to volume ratio

Question 6

4 advantages of using nanoparticles I’m materials

Answer 6

• they give better skin coverage
• they give more effective protection from the suns ultraviolet rays
• they are clear and colourless , making the sun cream invisible on the skin
• they don’t degrade in exposure to the sun

Question 7

3 risks of using nano-materials

Answer 7

• nanoparticles can be easily absorbed through the skin and may lead to cell damage
• breathing in nanoparticles may cause inflammation of the lungs
• they can have harmful effects on the environment