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Graphite is made from carbon atoms. The carbon atoms are joined together by things called "covalent bonds". Carbon atoms in graphite form flat sheets, and the atoms are joined together by alternating double and single bonds. A single covalent bond contains two electrons and a double covalent bond contains 4 electrons.

These alternating bonds swap positions many times every second, and as a result, electrons can move from one end of the graphite to the other.

This is a "Year 9" answer to the question. University physics students would need to discuss virtual particles and a bunch of other quantum mechanical concepts to answer this question properly.

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14y ago

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