The Classification of Elements, Compounds and Mixtures

Question 1

Element -

Answer 1

A substance that can’t be split into anything simpler by chemical means. An element contains only one type of atom.

Question 2

Important note:

Answer 2

Question 3

Compounds -

Answer 3

When two or more elements chemically bond together. The elements always combine in fixed proportions (e.g. Hydrogen and fluorine always combine to form hydrogen fluoride)

Question 4

Mixture -

Answer 4

Two or more substances not chemically combined that can be separated by physical means (e.g. a mixture of elements - nitrogen and oxygen)

Question 5

Important note:

Answer 5

A pure substance has a fixed melting and boiling point, but a mixture may melt or boil over a range of temperatures!