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664156
Macromolecules
Description
These are descriptions about Giant Covalent Substances: Diamond Graphite Silicon Dioxide (Sand)
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c2.1 structure and bonding
chemistry
gcse
chemistry
c2.1 structure and bonding
gcse
Mind Map by
anjumn10
, updated more than 1 year ago
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Created by
anjumn10
over 10 years ago
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Resource summary
Macromolecules
Diamond
Each carbon atom
>Strongly bonded to 4 other carbon atoms
>In Giant 3D lattice structure
Hard
Drills
Cutting tools
Don't conduct electricity
No charged Particles of free electrons
High melting and Boiling Point.
Graphite
Each Carbon atom
>Strongly bonded to 3 other carbon atoms
>turning layers of hexagon
Weak Forces of Attraction
Between layers
So can slide over each other
Used as:
Pencil leads
lubricant
3 of outer electrons in each carbon atom.
used to make the covalent bonds
The fourth electron
delocalised between layers.
Delocalised Electrons
Allows graphite to conduct electricity.
High Melting and Boiling Point
Strong Covalent Bonds
Giant Structure
Silicon Dioxide (Sand)
3D structure like Diamond
Silicon and oxygen atoms bonded together strongly.
High Melting and Boiling Point
NEVER conducts electricity.
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