Pure and impure chemical substances

1

Small circles representing atoms are joined in pairs

Does this show an element, a mixture or a compound?

2

Is water an element, compound or mixture?

3

What is the name of the process that occurs when salt is added to water and then stirred until the solid is no longer visible?

4

Is air an element, compound or mixture?

5

In what type of substance does diffusion take place most quickly?

6

In a solution of copper sulfate, what is the solvent?

7

What name is given to a substance that contains two types of atom that are not chemically joined together?

8

In a salt solution, what is the solute?

9

What process allows you to smell freshly baked bread in a supermarket, even when you are far from the bakery aisle?

10

What happens to the boiling point of water when salt is added to it?