Correct option is D
The correct answer is (d) Four.
· In a diamond, each carbon atom is covalently bonded to four other carbon atoms in a tetrahedral structure.
· This strong covalent bonding and the rigid three-dimensional lattice give diamond its exceptional hardness and high melting point.
Key Points:
1. Diamond is an allotrope of carbon where carbon atoms are arranged in a tetrahedral lattice.
2. Each carbon atom forms four sigma bonds with other carbon atoms.
3. This structure is responsible for diamond's transparency and high refractive index.
Information Booster:
· Allotropes of carbon: Diamond, graphite, graphene, and fullerenes.
· In graphite, each carbon atom bonds to three other carbon atoms in a hexagonal planar structure.
· Diamond is an excellent thermal conductor but a poor electrical conductor due to the absence of free electrons.