Year 10 Chemistry Revision
- Created by: bethany.steer
- Created on: 30-11-16 15:44
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- Year 10 mock exam chemistry revision
- Change of state
- Solid
- Low energy
- No movement
- Vibrate around a fixed position
- Liquid
- Some energy
- Random arrangement
- Gas
- High energy
- Moving
- Solid
- Atomic mass
- Unthe mass of an atom of a chemical element expressed in atomic mass units.titled
- Atomic number
- Number of protons and number of electrons
- Ions
- Atoms want to have a full outer most shell so they want the number 8 to form a stable ionic bond.
- Atoms that have a charge because they have lost/gained electrons.
- Atoms have no overall charge because the number of electrons equal the amount of protons. Ions will not have a charge.
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- Graphite
- Carbon
- 3 X covalent bonds
- Weak inter molecular force between layers.
- Partially conductive because of free electrons
- Soft/Slippery
- silica
- Oxygen+Silicon
- Covalent Bonds between atoms
- Not conductive = No free electrons
- Cryatalline Structure
- Diamond
- 4 X covalent bonds
- No free electrons
- High melting point
- Crystalline Structure
- Giant Ionic Lattice
- High melting point
- Strong electrostatic attraction in All directions.
- Positive Ions
- Negative Ions
- Solid cannot conduct because Ions are fixed if melted or dissolved ions are free as are the electrons.
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- Change of state
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