Year 8 Particles Key Words

Particles (year 8)

Alloy

An alloy is a mixture of two or more elements, at least one of which is a metal.

Chromatography

Chromatography is used to separate different substances dissolved in a liquid.

Compound

A substance formed by the chemical un ion of two or more elements.

Condense

Change of state from gas to liquid when the temperature drops to the boiling point.

Crystallisation

The process of producing crystals from a solution by evaporating the solvent.

Dissolve

When a substance breaks up and mixes completely with a solvent to produce a solution.

Distillation

A separation technique which involves a solution being heated so that the solvent evaporates before being cooled to form a pure liquid.

Element

A substance which contains only one type of atom.

Evaporation

The process in which a liquid changes state and turns into a gas.

Filtrate

Fluid that has passed through a filter.

Filtration

A process to separate an insoluble substance from a solvent.

Impure

A substance, usually unwanted, that is present in another substance.

Insoluble

Unable to dissolve in a particular solvent. For example, sand is insoluble in water.

Mixture

Two or more substances that are not joined together. The substances can be elements, compounds, or both.

Mobile Phase

Phase in chromatography that moves, usually a solvent or mixture of solvents.

Pure

It only contains one type of substance.

Residue

The material left over at the end of a process, often the material that is removed during purification of a substance.

Solubility

How easily the solute dissolves in the solvent.

Soluble

Able to dissolve in solvent. For example, sugar is soluble in water because it dissolves to form sugar solution.

Solute

The dissolved substance in a solution.

Solution

Mixture formed by a solute and a solvent.

Solvent

Mixture formed by a solute and a solvent.

Stationary Phase

Phase in chromatography that does not move, for instance, the paper in chromatography.