A pure substance which consists of only one type of atom.

A pure substance containing 2 or more different types of atoms. They are chemically combined into a fixed ratio.

Contains 2+ pure substances, physically combined with a varying ratio.

E.g. salt water

Characteristics of a substance that you can easily observe or measure without changing the composition

Describes how a substance combines with other substances to form new chemicals or how a substance breaks down.

E.g. flammability, reactivity

Particles vibrate vigorously until it is reached. Particles have enough energy to partially overcome attractive forces.

Particle move more rapidly. They have enough energy to overcome attractive forces.

A lot of solute dissolved in solvent. Solution usually darker in colour.

A small amount of solute dissolved in solvent. The solution is usually lighter in colour.

Contains the maximum amount of dissolved solute at that particular temperature.

More solute will dissolve at that particular temperature.

No new chemical substance is formed. Often reversible.

A new substance with different properties is formed.