Why diamond is hard while graphite is soft ?
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Diamond has a giant covalent lattaice and each carbon atom is bonded to 4 other carbon atoms. Graphite on the other hand is formed in layers and each carbon is bonded to 3 other carbon atoms. ... Graphite is soft because it has weak inter molecular forces between its layers.
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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.
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