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18 Cards in this Set
- Front
- Back
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Atomic radius
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"The distance from the centre of the nucleus to the outer electrons of an atom."
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Co-ordinate (dative) bond
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"A covalent bond in which the shared pair of electrons are provided by just one of the bonded atoms."
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Covalent bond
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"A shared pair of electrons."
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Cracking
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"A process used by the petroleum industry to produce shorter alkanes and alkenes from longer alkanes."
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Electronegativity
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"The power of an atom to withdraw electron density from a covalent bond."
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Empirical formula
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"A formula which gives the simplest whole number ratio of atoms of each element in a compound."
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First ionisation energy
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"The energy required to remove 1 (mole) electron(s) from 1 (mole) gaseous atom(s), forming 1 (mole) ion(s) with a single positive charge."
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How to calculate atom economy
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"= (relative) mass desired product / (relative) mass all reactants x 100
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How to calculate concentration
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"C=n/V (remember to divide cm3 by 1000)"
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How to calculate n
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"= m/Mr"
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How to calculate percentage yield
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"= actual yield / theoretical yieldx 100
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Ideal gas equation
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"pV=nRT (remember to convert units)"
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Mass number
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"Mass number = number of protons + neutrons (in the nucleus/atom)"
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Mole
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"The amount of a substance that contains the same number of particles as there are atoms in exactly 12g of 12C."
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Relative atomic mass
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"The mean mass of an atom of an element compared to one twelfth the mass of a 12C atom."
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Structural isomerism
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"Compound which have the same molecular formula but different structures/different structural formulae/different displayed formulae."
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functional group isomers
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"Compound which have the same molecular formula but different functional group eg alkenes and cycloalkanes"
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homologous series
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"molecules with the same functional group but differ by a CH2"
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