Preskoči na glavni sadržaj

Sign up for FREE

Nanopartilces

Posljednje ažuriranje over 1 year ago

3 questions

1

Pitanje 1

1.

Nanoparticles are very small particles. Put a ring around the correct range for the size of nanoparticles.

0.1 to 1 nm

1 to 100 nm

100 to 200 nm

200 to 1000 nm

1

1

Pitanje 2

2.

Which statements about nanoparticles are true?

Nanoparticles can be used to make sports equipment stronger.

Nanoparticles can occur naturally.

Nanoparticles have the same properties as larger particles.

Nanoparticles are about the same size as some molecules.

Pitanje 3

3.

Doctors use stitches to hold together large cuts so that they can heal properly.
A hospital is considering buying a new type of material to use for stitches.
They need to choose between a material that contains silver nanoparticles and a material that does not.
Which material should they choose? Justify your answer by explaining the risks and benefits of using each.
nanoparticle material is
nanoparticle material has antibacterial properties;
nanoparticles may be harmful to the body

stronger
Antibacterial
may be harmful
long term effects not known

Risks
Benefits