Giant Covalent Structures
- Each carbon atom forms four covalent bonds in a very rigid, giant covalent structure
- Hardest natural substance, so it's used for drill tips
- Pretty and sparkly too.
- Each carbon atom only forms 3 covalent bonds
- This creates layers which are free to slide over each other
- Graphite is soft and slippery too
- Weak intermolecular forces between the layers
- Non - metal - good conductor of heat and electricity
- Each carbon atom has one delocalised (free) electron and its these free electrons which conduct heat and electricity.
Silicon Dioxide (Silica):
- Sand is made of Silica.
- Each grain of sand is one giant structure of silicon and oxygen.
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