Question

Diff between Diamond and graphite ​

Answer 1

Hey mate,

Diamond

Graphite

It is the hardest substance known.

It is a soft  and brittle substance.

Carbon bonded to four different carbon atoms forming tetrahedron.

Each carbon atom is joined to three other carbon atoms by strong covalent bonds to form flat hexagonal rings.

Tetrahedrons combine to form 3-D structure.

Has 2-D layer-like structure in which atoms of a single crystal are arranged in a hexagonal ring in a single plane.

Does not conduct electricity

Good conductor of electricity

Hope it will help you

Answer 2

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1. Molecular structure

• Diamond: Giant covalent structure, with each carbon covalently bonded to four other carbon atoms in a tetrahedral arrangement to form a rigid structure.
• Graphite: It is also Giant covalent structure, with each carbon covalently bonded to three other carbon atoms in a hexagonal arrangement.

2.Hardness

• Diamond: Extremely hard. Due to rigid, tetrahedral arrangement of carbon atoms.
• Graphite: Soft. Layers of hexagonally arranged carbon atoms can slide over one another.

3.Electrical conductivity

• Diamond: Insulator. Mobile electrons are absent. All four valence electrons are used in covalent bonds.
• Graphite: Conductor. Three out of four valence electrons are used for covalent bonding with other carbon atoms. Remaining valence electrons can be delocalised across the planes of carbon atoms.