classifications

Elements

An element is a pure substance that has only one type of atom in it.

All elements have a 1 word Name and a Symbol and can be found on the periodic table.

Compounds

A compound is made up of 2 or more different elements that react in a fixed ratio. eg H20, CO2

Compounds are pure substances, but they are formed from Chemical Reactions.

These chemical reactions involve 2 or more different elements.

Molecules

A molecule is where 2 or more atoms (of the same element) become chemically combined

Mixtures Vs Elements Vs Compounds

Mixtures, Compounds and Elements,

Mixtures are Not pure substances.

Elements are pure and in the periodic table

Compounds are pure substances, made by chemically combining 2 or more elements.

Chemical reaction

Physical react