AQA AS Chemistry Key Words to know

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1st I.E.
The Energy required to remove an electron in an atom, from a mole of a gaseous atom
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Successive I.E.
The Energy required to remove an electron in ion, from a mole of a gaseous ion
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Relative atomic Mass
Mass of one atom divided by 1/12 of mass of C12 atom
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Relative molecular Mass
Mass of one molecule divided by 1/12 of mass of C12 atom
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Electronegativity
The power of an atom to pull the bonded electron pair towards itself in a covalent bond
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Enthalpy of Combustion
The enthalpy change when one mole of a substance is completely burnt in oxygen under standard conditions, under standard conditions
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Enthalpy of Formation
The enthalpy change when one mole of a substance is formed from its constituent elements, under standard conditions
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Mean Bond Enthalpy
The average bond dissociation enthalpy for a given type of bond take from a range of different compounds
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Catalyst
A substance that speed up a reaction without being used up, by providing an alternative pathway for the particles with a lower actvation energy
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Homologous Series
A set of organic compounds with the same functional group.
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Structural Isomerism
Compound with the same molecular formula with same number and type of atoms but different arrangement of atoms
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Stereoisomerism
Isomers with the same molecular formula, but different spatial arrangementq
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Activation Energy`
The MINIMUM energy that a particle needs in order to react
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Le Chatelier's Principle
A change in a condition which affects the equilibrium will shift to oppose the change
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Hess' Law
The enthalpy change of a reaction is independent of its route
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Polymers
Long chain molecules formed from monomers joining together
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Other cards in this set

Card 2

Front

The Energy required to remove an electron in ion, from a mole of a gaseous ion

Back

Successive I.E.

Card 3

Front

Mass of one atom divided by 1/12 of mass of C12 atom

Back

Preview of the back of card 3

Card 4

Front

Mass of one molecule divided by 1/12 of mass of C12 atom

Back

Preview of the back of card 4

Card 5

Front

The power of an atom to pull the bonded electron pair towards itself in a covalent bond

Back

Preview of the back of card 5
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