Question

Compare the properties of diamond and graphite by brainly

Answer 1

Here is your answer.

Diamond and graphite are both giant covalent substances made entirely of carbon atoms. Both have chemical formula , but they do not have a molecular formula.

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.

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.

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.

Answer 2

Hey mate ^_^

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Answer:
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=> They are chemically identical but very different physically.

=> Diamond’s density is greater than that of Graphite.

=> Graphite is surprisingly a good conductor but Diamond is not. 

=> Physical appearance of a Diamond is bright and shiny whereas Graphite is dark and dull.

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