Atoms!

Atom

The smallest unit of matter that has the properties of a chemical element.

Charge

A physical property that allows the particle to move through (or remain still in) an electromagnetic field.

Electrons

Particles with a negative charge.

Protons

Particles with a positive charge.

Neutrons

Particles with no charge; they are neutral (but we don't say that they have a neutral charge).

Neutral Atom

An atom without an overall charge.

Positive Atom

An atom with a positive charge.

Negative Atom

An atom with a negative charge.

Molecule

Two or more atoms joining together chemically.

Compound

A molecule that contains at least two different elements or atoms that are chemically combined.

Pure substance

One made up of only one type of atom or one type of molecule.

Chemical substance

Something that can't be separated into its components by physical methods.

Heterogeneous

Contain substances that are not uniform in composition.

Homogeneous

Mixtures are the same throughout and cannot be separated by physical means.

Filtration

Separates an insoluble solid from a liquid or solution.

Insoluble

One that does not dissolve

Chromatography

Is a separation process that requires two different phases of matter.

Evaporation

Separates a soluble solid from a liquid.

Soluble

One that does dissolve.

Extraction

The act of isolating one compound from another.

Distillation

The action of purifying a liquid by the process of heating and cooling.