Why diamond is hard and graphite is soft
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Graphite is formed under less pressure and temperature. Diamond is formed under high pressure and temperature
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- A diamond crystal is a giant molecule of carbon atoms. Each carbon atom in the diamond crystal is linked to four other carbon atoms by strong covalent bonds. The four surrounding atoms are at four vertices of a regular tetrahedron. This rigid structure of diamond makes it a very hard substance.
- Graphite is soft because it has weak inter molecular forces between its layers.
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