Elements, Mixtures and Compounds

A pure substance is a single substance (element or compound) that is not mixed with anything else.

Mixture of elements

The elements are not bonded together.

The element still have their own properties.

The atoms can be in any ratio.

It is easy to seperate the elements as the atoms aren’t bonded.

Some methods that can be used to produce the elements are; Filtration, Distillation, Chromatography, Seperating Funnel, Fractional Distillation and Crystallisation.

Compouds

The elements are bonded together.

It has its own unique properties that are different to the elements.

The formula is fixed with atoms in fixed ratios.

it is very hard to seperate the elements as the atoms are bonded to each other.

Some methods that can be used to produce the elements; Thermal Decompostion, Electrical Decompostion (Electrolysis)