The concepts of allotropy was originally proposed in 1841 by the Swedish scientist Baron Jöns Jakob Berzelius (1779–1848). Allotropy or allotropism is the property of a few chemical elements to exist in some different forms, inside same physical express, known as allotropes of these elements. Allotropes are wide and varied structural modifications of the element; the atoms in the element are bonded together in the different manner.