C2 - Nanoparticles

How big are course particles?

Diameter between 2,500nm and 10,000nm, also called dust.

How big are fine particles?

Diameter between 100nm and 2,500nm.

How big are nanoparticles?

Diameter between 1nm and 100nm, only a few hundred atoms.

What is the study of nanoparticles called?

Nanoscience

How do you work out a surface area to volume ratio?

$$ratio=\frac{surface\cdot area}{volume}$$

What happens to the surface area to volume ratio as particles get smaller?

It increases.

Do nanoparticles have a high or low surface area to volume ratio?

Very high.