Question
Crystalline and non-crystalline forms of carbon.
| Crystalline forms of carbon | Non-crystalline forms of carbon |
| (i) A crystalline form has a regular and definite arrangement of atoms.(ii) They have high melting points and boiling points.(iii) A crystalline form has a definite geometrical shape, sharp edges and plane surfaces.(iv) Diamond, graphite and fullerene are different crystalline forms of carbon. | (i) A non-crystalline form does not have a regular and definite arrangement of atoms.(ii) They have low melting points and boiling points.(iii) They are amorphous, hence, they do not have definite geometrical shape.(iv) Coal, charcoal and coke are different noncrystalline/amorphous forms of carbon. |
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