C2a
- Created by: anniedarlington
- Created on: 30-03-15 11:12
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- C2a
- Giant ionic structures
- Will conduct electricity when molten, high boiling point
- Giant covalent structures
- Graphite - free electrons has each carbon atom has one delocalised electron
- Arranged in layers which can slide over one another due to weak intermolecular forces between layers
- Diamond - each carbon atom forms 4 complete covalent bonds in a very rigid covalent structure
- Graphite - free electrons has each carbon atom has one delocalised electron
- Metallic structures
- Alloys are harder than pure metal - different elements have different sized atoms so layers become distorted so they can't slide over one another
- Nitinol is affected by temperature
- Calculating masses
- Go over method
- Paper chromatography
- Place substance in cup with solvent, put a spot of coloured solution on a pencil baseline on filter paper, put paper in beaker of solvent, solvent soaked up, measure distances of travelling dyes
- Instrumental methods (machines)
- Sensitive, fast and accurate
- Giant ionic structures
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