CHEMISTRY OF LIFE BY: MASON LONG

An atom has a positive charge

An element is made up of one kind of atom

Compounds are made up of two or more elements in exact porportions

Molecules are atoms held together by chemical bonds

Molecular compunds form when different atoms share their outmost electrons

Electrically charged atoms postive or negative are called ions

Ions of opposite charges attract to one another to form ionic compounds

A combination of substances where individual substances retain ther own properties

Always contain carbon and hydrogen and are usually associated with living things

Inorganic compounds are made from elements other than carbon