Covalent Substances
- Created by: Azzab123
- Created on: 14-05-14 15:14
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- COVALENT SUBSTANCES
- Simple Molecular Substances
- Feeble Intermolecular foces - low melting & Boiling point - molecules are easily parted from each other
- Mostly gases or liqudis at room temp.
- don't conduct electricity - no ions - no electrical charge
- Giant Covalent structures are MACROMOLECULES
- No Charged Ions, very high melting & boiling point, don't conduct electricity
- Diamond - each carbon atoms have four covalent bonds - very rigid structure. Hardest natural substance - used for drill bits, also pretty and sparkly
- Graphite - Each carbon atoms = 3 covalent bonds - layers - slide over each other - soft and slippery - weak intermolecular forces between layers - however good conductor of heat and electricity.
- Each Carbon atom has one delocalised electron which conducts heat and electricity
- Silicon Dioxide - (Silica) what sand is made of, one giant structure of silicon and oxygen
- Simple Molecular Substances
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