C2

Question 1

What is the diameter of nano particles?

Answer 1

1nm-100nm
0.0000001 m

Question 2

Why are nano particles useful ?

Answer 2

Very large surface area to volume ratio
Very large strength to weight ratio

Question 3

Why could nano particles be dangerous?

Answer 3

Relatively new
Need to be tested and better understood
Unclear wheather it enters through skin and damages cells

Question 4

What can nanoscience be used for?
Sn creAm

Answer 4

Catalysts
Nano medicine (delivers drugs to organelles)
Electrical circuits (some conduct electricity)
Computer chips
Silver nano particles are anti-bacterial and remove infection

Question 5

Why do small covalent molecules have low boiling/melting points?

Answer 5

Weak intermolecular forces between molecules means it requires little energy to break the bonds.

Question 6

What happens as the size of the atoms increase?

Answer 6

Require more energy to break bonds

Question 7

What does one line represent in a stick diagram ?

Answer 7

One pair of electrons shared

Question 8

Covalent bonds are ——-

Answer 8

Strong