Chemistry 2 (chem) 0.0 / 5 ? ChemistrychemGCSEWJEC Created by: Emma TwistCreated on: 13-11-13 20:36 RAM Relative atomic mass is the mass of an atom in relation to 1/12 of a carbon atom 1 of 16 Isotopes Different versions of the same atom 2 of 16 Displacement reaction A more reactive halogen will displace a less reaction halogen from it's compound. 3 of 16 Sublimination Going from a solid to a gas without going in a liquid state e.g.iodine 4 of 16 Metals as good conductors Metals are good conductors as the negative ions are free to move because they aren't fixed 5 of 16 Intermolecular Between molecules. Weak attraction. Gas. 6 of 16 Intramolecular Within molecules. Strong attraction. 7 of 16 Aletropes Carbon in different forms e.g. graphite and diamond. 8 of 16 Smart materials They have properties that change reversibly within a change in their surroundings. 9 of 16 Thermochromic pigment Change colour at temperature by re-orientating themselves (T-shirt) 10 of 16 Photochromic pigments Change colour at light intensity (Glasses) 11 of 16 Shape memory polymer Regain their shape when heated. Plastics. Called shape retention. (Gumshields) 12 of 16 Shape memory alloy Changes shape. Metal. (Glasses) 13 of 16 Hydrogel Swells or shrinks with water. Up to 1000 times it's own volume. (Nappies) 14 of 16 Thermoplastics Softens easily and can be remolded. Weaker forces between separate polymer chains. 15 of 16 Thermosets Do not soften. If heated they will eventually break down and char. Hard and rigid. Chains are fixed with strong bonds. 16 of 16
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