Elements Compounds And Mixtures

Question 1

What are elements

Answer 1

Elements are substances made up of one type of atom

Question 2

What is a compound

Answer 2

A substance made up of 2 or more types of atoms chemically bonded together

Question 3

What are mixtures

Answer 3

A substance made up of two or more atoms not chemically bonded together

Question 4

What is simple distillation

Answer 4

To separate a solvent from a solute (a soluble solid from a liquid or two liquids with different boiling points)

Question 5

What is fractional distillation

Answer 5

Fractional distillation is the process of separating crude oil into groups of hydrocarbons with similar numbers of carbon atoms

Question 6

What is filtration

Answer 6

To separate insoluble solid from a liquid or a solution

Question 7

What is crystallisation

Answer 7

A soluble solid separated from a liquid using heat and an evaporation basin

Question 8

How to calculate the rf value

Answer 8

Distance moved by the spot/distance travelled by the solvent