Nano particles

Question 1

What is the size of a nano particle

Answer 1

1x10-9 or 0.000000001

Question 2

Why are nano particles used for equipment

Answer 2

nanoparticles are added to materials to make them stronger whilst often being lighter. They have been used in tennis rackets, golf clubs and shoes

Question 3

Why are nano particles used in clothes

Answer 3

silver nanoparticles have been added to socks. This stops them from absorbing the smell of sweaty feet as the nanoparticles have antibacterial properties

Question 4

What are they used in healthcare

Answer 4

nanoparticles are used in sunscreens. They offer protection and can be rubbed in so there are no white marks.

Question 5

Why are nano particles harmful

Answer 5

Nanoparticles may be toxic to people as they may be able to enter the brain from the bloodstream and cause harm.

Question 6

How do nano particles appear

Answer 6

Some of these nanoparticles occur naturally, for example in volcanic ash. Some occur by accident, for example during the combustion of fuels. Many occur by design.

Question 7

Are nano particles very reactive and do they have strong attraction

Answer 7

Yes

Question 8

Metalic bonding

Answer 8

Electrostatic attraction between positive metal ions and delocalised electrons