1.2 Elements, compounds, and mixtures

Question 1

What is an element?

Answer 1

A substance that cant be split into anything simpler by chemical means

Question 2

How are elements shown in diagrams?

Answer 2

As atoms of a single colour or size

Question 3

What is a compound?

Answer 3

Something that is formed when two or more elements chemically combine

Question 4

How are compounds shown in diagrams?

Answer 4

More than one type of atom bonded together

Question 5

What is a mixture?

Answer 5

Various substances mixed together and no chemical reaction occurred

Question 6

What is filtration?

Answer 6

Can be used to separate a solid from a liquid, by using filter paper and a funnel into a beaker.

Question 7

What is crystallisation?

Answer 7

Can be used to separate a solute from a solution

Question 8

What is simple distillation and describe it?

Answer 8

Can be used to separate the components of a solution, the water is boiled and condensed back to a liquid by the condenser

Question 9

What is fractional distillation and describe it?

Answer 9

Used to separate a mixture of liquids, by boiling both liquids, all the water condenses in the column and trickled back to the flask.

Question 10

What is paper chromatography?

Answer 10

Used to separate a variety of mixtures of coloured inks

Question 11

Formula for measuring how far the color has gone

Answer 11

distance moved by the spot/distance of the whole paper