Topic 1 - Elements, Compounds, Mixtures

Question 1

what is an element?

Answer 1

a substance only containing one type of atom

Question 2

what is a compound?

Answer 2

a substance made of two or more different elements chemically bonded together

Question 3

is it easy to separate a compound?

Answer 3

no, it’s very difficult

Question 4

are the properties of a compound similar to the original elements?

Answer 4

no, they are often totally different

Question 5

what is a mixture?

Answer 5

a substance made of two or more different elements NOT chemically bonded

Question 6

are the properties of a mixture similar to the original elements?

Answer 6

yes, the properties are a mixture of the properties of the elements

Question 7

is a mixture a pure substance?

Answer 7

no

Question 8

what is a pure substance?

Answer 8

a substance completely made up of a single element/compound

Question 9

what is the main property of a pure substance that makes it different to a mixture?

Answer 9

they have specific boiling points, mixtures boil over a range of tempratures