chemical bonding, structure and properties
- Created by: Nadia
- Created on: 22-12-12 17:08
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- chemical bonding, structure and properties
- metals, ionic compounds, simple molecular covalent substances and giant covalent substances have different properties
- 'sea' of delocalised electrons /lattice of positive ions have structural model for metals explain their physical properties
- the electronic structure of atoms can help to explain how ions are formed
- dot and cross diagrams can show how ionic bonding takes place in simple binary compounds formed from group 1/2 and 6/7 elements
- dot and cross diagrams can show the covalent bonding in simple molecules including double bonds
- the structural model for giant ionic structures explain the physical properties of ionic substances
- electronic structure of atoms can help explain the physical properties of simple molecular substances
- intermolecular bonding structural model for simple molecular structures can explain the physical properties of simple molecular substances
- dot and cross diagrams can show how ionic bonding takes place in simple binary compounds formed from group 1/2 and 6/7 elements
- the structures +properties of diamond, graphite and carbon nanotubes can be described in terms of their bonding and structure
- the properties and uses of carbon nanotubes relate to their bonding and structure
- smart materials have properties which change reversibly to a stimulus (change) in the enviornment
- thermochromic pigments change colour with changing temperature
- photochromic pigments change colour with changing light intensity
- hydrogels absorb/expel water and shrink/swell up to 1000x their volume due to changes in pH or temperature
- shape-memory alloys regain their original shape when heated
- shape-memory polymers regain their original shape when heated
- uses of smart materials depend on their properties
- metals, ionic compounds, simple molecular covalent substances and giant covalent substances have different properties
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