Reactions to decomposition are the reverse of combination reactions

Reactions to decomposition are the reverse of combination reactions.
The decomposition reaction is also the break in two or more components of a compound.
Another type of redox reaction is one in which an element replaces or displaces another from a compound.
In these reactions, known as single replacement reactions, the element which replaces that which is in a compound is always oxidized. The element being displaced, is always reduced.
A redox reaction is a chemical reaction that involves a transfer of electrons between two species.  Oxidation numbers are used by chemists to keep track of electrons within a compound. A combination reaction  is a reaction where two or more elements combine A combustion reaction where a compound and an oxidant is reacted to produce heat and a new product. Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound.Decomposition reactions involves breaking down a compound into smaller compounds or individual elements.