Question

Define allotropy?

Answer 1

Allotropy is defined as the existence of an element in two or more different forms, which may vary in the positioning of atoms in a solid that contains a different number of atoms. The physical properties of allotropes varies from one another.

For example: There are many allotropes of Carbon-

(i) The main four allotropes of carbon are: Diamond, graphite, graphene, and buckminsterfullerene.

(ii) Diamond is hard in nature because in the three-dimensional structure of diamond carbon atoms are linked by covalent bonds.

(iii) Graphite is soft in nature due to the weak van der Waal's forces of attraction.

(iv) A single atomic layer of graphite is known as graphene.