Metals (chemistry)
- Created by: AOconnor
- Created on: 13-05-18 15:12
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- Metals
- Graphene
- single layer of graphite (1 atom thick)
- Hexagonal structure
- Strong, nearly transparent and good conductor (thermal and electricity)
- Fullerenes
- Form of carbon where atoms join to form hollow structure
- Buckminsterfullerene was first to be discovered
- 60 carbon atoms joined in series of hexagons and pentagons
- Most symmetrical and most stable
- Uses
- Deliver drugs in body
- Lubricants
- catalysts
- Reinforce materials (strong but lightweight)
- Carbon nanotubes are cylindrical fullerenes
- Polymers (large molecules)
- Atoms held together via strong covalent bonds
- Intermolecular forces are quite strong between larger molecules
- Solid at room temperature
- Intermolecular forces are quite strong between larger molecules
- Atoms held together via strong covalent bonds
- Bonding
- Occurs in both alloys and metallic elements
- Attraction between positive ions and negatively charged delocalised electrons
- Metals are giant structures and have delocalised electrons in the outer shell
- Produces regular arrangement of positive ions held together by electrostaic attraction to delocalised electrons
- Occurs in both alloys and metallic elements
- Alloys
- Mixtures containing a metal and another element
- Added element disturbs regular structure of metal atoms
- Layers don't slide as easily
- Stronger and harder than pure metals
- Layers don't slide as easily
- Added element disturbs regular structure of metal atoms
- Mixtures containing a metal and another element
- Properties of pure metals
- High melting and boiling points
- Useful structural materials
- Delocalised electrons carry charge
- Good electrical and thermal conductors
- Regular arragement means layers slide
- Can be bent and shaped easily (ductile and malleable)
- Useful for wiring and pipes
- Can be bent and shaped easily (ductile and malleable)
- High melting and boiling points
- Graphene
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