Covalent Lattices (VCE SSCE Chemistry): Flashcards
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Allotropes
Allotropes
Different structural forms of the same element
Covalent lattices
Covalent lattices
Continuous 3D networks of atoms bonded by covalent bonds
No. of C atoms each C bonds to in diamond
No. of C atoms each C bonds to in diamond
Four
Diamond's hardness ranking
Diamond's hardness ranking
Hardest naturally occurring substance
Why diamond doesn't conduct electricity
Why diamond doesn't conduct electricity
All 4 valence electrons in bonds, none delocalised
No. of C atoms each C bonds to in graphite
No. of C atoms each C bonds to in graphite
Three
Source of delocalised electrons in graphite
Source of delocalised electrons in graphite
4th valence electron from each C atom
Why graphite conducts electricity
Why graphite conducts electricity
Delocalised electrons free to move through layers
Why graphite is slippery and soft
Why graphite is slippery and soft
Weak dispersion forces between layers allow sliding
Amorphous carbon structure
Amorphous carbon structure
Irregular, non-crystalline, lacks regular structure