Elements Compounds Mixtures

Question 1

An element

Answer 1

A substance made up of only one atom

Question 2

Molecules

Answer 2

Composed of two or more atoms chemically combined

The smallest part of an element or compound

Question 3

Compound

Answer 3

Consists of two or more elements chemically combined

Question 4

Mixtures

Answer 4

Two or more substances mingled together but not chemically combined
Mixtures can be made up of elements or compounds but in no definite amounts

Question 5

Points compounds

Answer 5

Made of a single substance
Elements in a compound are always in a fixed ratio
Difficult to separate the elements of a compound
Properties of a compound are different to those of the elements it contains
Is there is usually a heat change when a compound is formed

Question 6

Points of mixtures

Answer 6

Made up of two or more substances
Amounts of substances in a mixture can very
Easy to separate the substances in a mixture
Properties of a mixture are similar to those of the substances in the mixture
Little heat change when a mixture is made