Each C atom forms ____ covalent bonds. Covalent bonds are very strong, giving graphite an extremely high ____ point. Diamond is also the ____ natural material known. The ____ of C atoms in graphite are held next to each other by very ____ forces. This allows the layers to ____ over each other very easily, causing graphite to be soft and slippery. Because ____ is soft and ____, it is used in ____ and bike-chain oil. Each C atoms only uses three of its outer shell ____ for bonding, meaning that there are free, ____ electrons present. For this reason, graphite is an electrical ____.

Graphite

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