(Decomposition+Reactions)

=Decomposition=

http://upload.wikimedia.org/wikipedia/commons/4/4c/Chemical_decomposition.gif

Chemical decomposition is the separation (or decomposition) of a chemical compound into simpler compounds and elements.

http://images.tutorvista.com/content/chemical-reactions-equations/mercuric-oxide-on-heating.jpeg

This picture shows the decomposition Mercury (II) Oxide. By heating the substance, it decomposes into Mercury (II) and Oxygen.

2HgO -> 2Hg + O2