Elements, Compounds and Mixtures
A sample of matter that has definite chemical and physical properties.
pure substance that cannot be separated into simpler substance by physical or chemical means.
contains one type of atom.
Pure substance composed of two or more different elements joined by chemical bonds.
A combination of two or more pure substances that are not chemically combined.
substances held together by physical forces, not chemical
No chemical change takes place
Each item retains its properties
They can be separated physically