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Graphite is a form of carbon.Why can graphite be used as a lubricant?
A.
Graphite contains delocalised electrons which move throughout the structure.
B.
Graphite contains weak covalent bonds so the atoms move easily.
C.
Graphite has a low melting point so it easily turns into a liquid.
D.
Graphite has weak forces of attraction between layers so they can move.