AQA AS Chemistry Definitions

First ionisation energy

relative atomic mass

second ionisation energy

empirical formula

covalent bond

metallic bond

electronegativity

homologous series

structural isomerism

chain isomerism

positional isomerism

functional group isomerism

initiation (free radical substitution)

propagation (free radical subs)

termination (free radical subs)

standard enthalpy of formation

mean bond enthalpy

standard enthalpy of combustion

enthalpy change

Hess's law

disproportionation

geometrical isomer

inductive effect