honors chem matter and pure substances

Matter

Can be classified as a pure substance or a mixture.

Element

A substance that cannot be broken down into simpler substances by chemical means.

Compound

A pure substance made of two or more elements chemically bonded in a fixed ratio.

Homogeneous mixture

A mixture that has a uniform composition throughout.

Heterogeneous mixture

A mixture that does not have a uniform composition.

Colloid

A type of mixture containing intermediate-sized particles that do not settle out.

Suspension

A mixture in which particles are dispersed throughout but are large enough to settle out.

Filtration

A separation technique that separates an insoluble solid from a liquid.

Chromatography

A technique used to separate the components of a mixture based on their movement through a stationary phase.

Distillation

A separation technique based on different boiling points of liquids.

Solvent

The substance in which the solute is dissolved.

Solute

The dissolved substance in a solution.

Chemical formula

A representation of a substance using symbols for its constituent elements.

Physical change

A change that does not alter the chemical composition of a substance.

Chemical change

A change that results in the formation of new chemical substances.

Mixture

A combination of two or more substances that are not chemically bonded.

Fixed ratio

A specific proportion of elements in a compound.

Homogeneous mixture (solution)

A mixture with very small particles evenly distributed.

Heterogeneous mixture example

Oil and vinegar.

Colloid example

Whipped cream.

Suspension example

Sand in water.

Separation technique based on boiling points

Distillation.

True statement about pure substances

They have definite chemical and physical properties.