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AS Chemistry Definitions

Structural
Isomer
Stereoisomer
Homolytic
Fission
Heterolytic
Fission
Homologous
series
Functional
Group
Curley Arrow
Radical
Nucleophile
Electrophile
Activation
Energy
Standard
conditions
Enthalpy
Change of
Formation
Enthalpy
Change of
Combustion
Bond Enthalpy
Average bond
enthalpy

A compound with the same molecular formula however a
different structural formula
A compound with the same structural formula however a
different arrangement of atoms in space
The breaking of a covalent bond where each atom takes one
electron forming radicals
The breaking of a covalent bond where one atom takes both of
the electrons forming cations and anions
A group of compounds with the same functional group however
a different hydrocarbon chain length
A group of atoms responsible for the chemical properties of a
compound
The movement of an electron pair either breaking or forming a
covalent bond
A species with an unpaired electron
A electron pair donor
An electron pair acceptor
The minimum amount of energy required to start a chemical
reaction
25°C and 1 ATM
The enthalpy change when one mole of a compound is formed
from its constituent elements in there standard states under
standard conditions (25°C and 1 ATM)
The enthalpy change where one mole of a compound is
completely combusted in excess oxygen under standard
conditions (25°C and 1 ATM)
The enthalpy change when breaking a bond within one mole of a
given substance by homolytic fission in a gaseous state

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