Question

Plz answer fast I will mark that answer brailiest​

Answer 1

1)graphite is used as lubricant due to its slippery nature . graphite has layers of carbon atoms, with weak forces , residing in between it's layers because of which is quite slippery .

2) electricity conducted in crystal by electrons that are relatively free. but in diamond each carbon atom is covalently bonded with four other carbon atoms and there are no free electrons. this is also reason of their hardness.

3)because in graphite each carbon atom has free electrons in its valance shell free electrons are responsible for conductivity of electricity.

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