#reaction types

The Law of Conservation of Matter states that matter can neither be created nor destroyed.

Combination reactions involve two or more reactants which combine to form one product.

A + B → AB

The combustion reaction is a type of combustion reaction, where the substance is burned in the process of a gas.

Formation reactions are a type of combination reaction in which a single product is formed from elements in their standard states.

Metals deteriorate in corrosion reactions when a liquid or gas (usually oxygen) chemically attacks the surface of the metal.

Decomposition reactions occur when a compound breaks down into two or more substances, usually as a result of heating, electrolysis or light.

AB → A + B

Single displacement reactions occur when an atom (or ion) of one compound is replaced by an atom of another element.

A + BC → AB + C

In a redox reaction, electrons are transferred between species.  The oxidation of at least one element will change.

The oxidation number is the number assigned to an atom in an ion or molecule that denotes its real or hypothetical charge.

Oxidation is the loss of electrons by a species; reduction is a gain of electrons.

An oxidizing agent is a substance that accepts electrons from another species.  A reducing agent is a substance that donates electrons to another species.

In double displacement reactions, also called metathesis reactions, elements from two different compounds displace each other to form two new compounds.

AB + CD → AC + BD

Neutralization reactions involve an acid and a abase reacting to form a salt and usually water.