Matter Flowchart MATTER Can it be physically separated? Homogeneous Mixture (solution) Heterogeneos Mixture Compound Element yes no Is the composition uniform? yes Can it be chemically decomposed? Yes No No MIXTURE PURE SUBSTANCE
A Pure substance is one which is made up of only one kind of particles
All Elements and Compounds are Pure substance
EX : Oxygen, nitrogen, iodine, iron,
silicon, silver, gold , etc.
Composed of identical atoms
Only one kind of atoms
EX : copper wire, aluminum foil
Composed of 2 or more elements in a fixed ratio
Properties differ from those of individual elements
EX : table salt (NaCl)
Law of Definite Composition
A given compound always contains the same, fixed ratio of elements.
Law of Multiple Proportions
Elements can combine in different ratios to form different compounds.
Two different compounds, each has a definite composition.
A Mixture contains two or more different kinds of particles (pure)
All mixtures Are Impure
Variable combination of 2 or more pure substances.