Differentiate between the crystalline form of carbon and the non-crystalline form of carbon.
The crystalline form of carbon is definite in molecular structure, but non-crystalline isn't. Molecules in the non-crystalline form are arranged randomly without any fixed pattern or shape. This form is also called an amorphous form of carbon.
Crystalline form eg., Diamond, Graphite, Fullerene, Buckyballs, Carbon Nanotubes, etc.
Non-crystalline eg., Coal, Coke, etc.