| − | Reactions that change a compound into its constituent elements.<ref>Wile, Dr. Jay L. ''Exploring Creation With Chemistry''. Apologia Educational Ministries, Inc. 1998</ref>
| + | A decomposition reaction is a reactions that changes a compound into its constituent elements or polyatomic ions (Ions made of multiple elements).<ref>Wile, Dr. Jay L. ''Exploring Creation With Chemistry''. Apologia Educational Ministries, Inc. 1998</ref> |