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C2 Chemistry - Key Words Key Ideas Definitions




Bonding

Compound - two or more elements chemically combined
Noble Gas - Full outer shell
Giant Ionic structure
Lattice structure
Electrostatic forces of attraction between ions

Group 0 - full outer shell (unreactive)
Group 7 - form ions with -1 charge
Group…

Page 2

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C2 Chemistry - Key Words Key Ideas Definitions




Boiling requires forces of energy to break the weak intermolecular forces NOT the
strong covalent bonds.
This means simple molecules have a low boiling point

Ionic Compounds
Giant ionic lattice
Strong electrostatic forces
High melting points
High boiling points
Conduct electricity as…

Page 3

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C2 Chemistry - Key Words Key Ideas Definitions




Arranged in branches (separated




)
Soft
Made in a different way to HD polymers
High density polymer
Hard
High melting point
Thermosoftening
Softens/melts when heated
Good for recycling
Thermosetting
Strong covalent bonds between polymer chains
Cannot change the shape

Mass
Relative Atomic…

Page 4

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C2 Chemistry - Key Words Key Ideas Definitions




Ar of hydrogen = 1
Ar of oxygen = 16
Mr = 1 + 1 + 16
= 18

Paper chromatography
Strip of paper, pencil line, drop of substance, dip into beaker containing solvent, put on a
lid (prevent evaporation), substance does…

Page 5

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C2 Chemistry - Key Words Key Ideas Definitions




C2H4
But the empirical formula is
CH2

Percentage Yields
The amount of something you get, compared to what you expect to get
Some may be lost when separated from another mixture
Reaction might be reversible
May react in ways that are different…

Page 6

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C2 Chemistry - Key Words Key Ideas Definitions





Endothermic reaction
Takes in energy from the surroundings (gets cold)
e.g. thermal decomposition
Application: Cold pack

Reversible Reactions
They are endothermic one way and endothermic the other way
The amount of energy the take in endothermically, is equal to the amount they…

Page 7

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C2 Chemistry - Key Words Key Ideas Definitions




Negative ions attracted to Anode and lose electrons (o




xidation)
OILRIG - Oxidation Is Loss Reduction Is Gain

Half Equations e.g.
Negative electrode: Pb2- + 2e- > Pb
Positive electrode: 2Br- > Br2 + 2e-

Extraction of aluminium
Extracted by electrolysis
Aluminum…

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C2 Chemistry - Key Words Key Ideas Definitions












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