Answer:
1. Yes.
Pure carbon can exist in different forms depending on how its atoms are arranged.
The forms pure carbon can exist in include: diamond, graphite, and fullerenes. All three forms exist as crystals, but they have different structures.
2. WHY?
Each carbon atom forms four covalent bonds.
Atoms of carbon can either bond with each other or with atoms of other elements in which, the bonds may be single, double, or triple bonds. Because of carbon's ability to form so many covalent bonds, it often forms polymers.
Step-by-step explanation: