1. Allotropy is a property shown by the elements.
2. The property of an element to exist in two or more physical forms having more or less similar chemical properties but different physical properties is called allotropy.
3. The different forms of the element are called allotropes and are formed due to the difference in the arrangement of atoms.
4. Example for allotropes : Allotropes of carbon.
Allotropes of carbon are classified into two types. They are
1) Amorphous forms,
2) Crystalline forms.
3) Amorphous forms of carbon: Coal, coke, wood, charcoal, animal charcoal, lampblack, gas carbon, petroleum coke, sugar charcoal.
4) Crystalline forms of carbon : Diamond, graphite and buckminsterfullerene.
