Chemistry 2 (chem)

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Relative atomic mass is the mass of an atom in relation to 1/12 of a carbon atom
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Isotopes
Different versions of the same atom
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Displacement reaction
A more reactive halogen will displace a less reaction halogen from it's compound.
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Sublimination
Going from a solid to a gas without going in a liquid state e.g.iodine
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Metals as good conductors
Metals are good conductors as the negative ions are free to move because they aren't fixed
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Intermolecular
Between molecules. Weak attraction. Gas.
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Intramolecular
Within molecules. Strong attraction.
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Aletropes
Carbon in different forms e.g. graphite and diamond.
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Smart materials
They have properties that change reversibly within a change in their surroundings.
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Thermochromic pigment
Change colour at temperature by re-orientating themselves (T-shirt)
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Photochromic pigments
Change colour at light intensity (Glasses)
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Shape memory polymer
Regain their shape when heated. Plastics. Called shape retention. (Gumshields)
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Shape memory alloy
Changes shape. Metal. (Glasses)
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Hydrogel
Swells or shrinks with water. Up to 1000 times it's own volume. (Nappies)
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Thermoplastics
Softens easily and can be remolded. Weaker forces between separate polymer chains.
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Thermosets
Do not soften. If heated they will eventually break down and char. Hard and rigid. Chains are fixed with strong bonds.
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Other cards in this set

Card 2

Front

Different versions of the same atom

Back

Isotopes

Card 3

Front

A more reactive halogen will displace a less reaction halogen from it's compound.

Back

Preview of the back of card 3

Card 4

Front

Going from a solid to a gas without going in a liquid state e.g.iodine

Back

Preview of the back of card 4

Card 5

Front

Metals are good conductors as the negative ions are free to move because they aren't fixed

Back

Preview of the back of card 5
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