Graphite

Octet rule唔係一定正確
BCl5(10粒)，Cu2+(唔係octet)都成立到
Bond唔係一定要跟octet rule去行
Energy change先重要因素(octet structure多數係最低能量排列)
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Graphite係carbon 進行sp2 hybridization
淨低果粒e- 做delocalized pi e-
最重要係依種排法個total energy content係比其他排法低
如果要跟octet rule,咁鑽石咪好常見?

Each C atom has 3 bond pairs of electrons and 1 delocalized electrons. The electrons are delocalized along (above and below) the plane of atoms. Such delocalization of electrons is a special form of sharing electrons, and thus each C atom in graphite obeys the octet rule.

graphite can conduct electricity due to the vast electron delocalization within the carbon layers. These valence electrons are free to move, so are able to conduct electricity. However, the electricity is only conducted within the plane of the layers.


圖片參考：http://www.benbest.com/cryonics/graphite.gif