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10 cards from this deck
Different structural forms of the same element
Continuous 3D networks of atoms bonded by covalent bonds
Four
Hardest naturally occurring substance
All 4 valence electrons in bonds, none delocalised
Three
4th valence electron from each C atom
Delocalised electrons free to move through layers
Weak dispersion forces between layers allow sliding
Irregular, non-crystalline, lacks regular structure
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