Elements, Compounds and Mixtures 1.8

Question 1

Define an element

Answer 1

Elements consist of only one type of atom

Question 2

Define a compound

Answer 2

A compound is a substance that is made of two or more different elements which are chemically bonded together

Question 3

Define a mixture

Answer 3

A mixture is a substance that is made of two or more different elements which are NOT chemically bonded together

Question 4

Which is easier to separate: A compound or a mixture

Answer 4

A mixture as they are not chemically bonded together

Question 5

How is carbon dioxide formed

Is it an element, compound or mixture?

Answer 5

Carbon (C) reacts with Oxygen (O) to form Carbon Dioxide (CO2)
Carbon and Oxygen are both elements
Carbon Dioxide is a compound

Question 6

Name four physical methods of separation

Answer 6

Distillation, Filtration, Crystallisation and Chromatography

Question 7

Have the elements in a Mixture reacted together?

Answer 7

NO

A mixture had properties of all its elements

Question 8

Is an element pure?

Answer 8

Yes, it has a specific melting and boiling point

Question 9

Is a mixture pure?

Answer 9

No, it will melt or boil gradually over a range of temperatures