11830093
Description
Flashcards by J yadonknow, updated more than 1 year ago
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Created by J yadonknow
almost 8 years ago
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| Question | Answer |
| What sort of structure do non-metallic elements exist as? | Simple covalent structures, forming a simple molecular lattice held together by weak intermolecular forces Low mpt/bpt |
| What do C,Si, and B exist as? | Giant covalent lattices All have 4 valence electrons Forms tetrahedral structure |
| What are the properties of Giant Covalent lattices? | High mpt/bpt Insoluble, covalent bonds too strong to be broken by interaction with solvents Non-conductors of electricity |
| What structures are the exception in terms of conductivity? | Graphene and Graphite Form planar hexagonal molecules Delocalised spare electron can carry charge |
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