even parityexchange energyexchange forceexchange integralexchangerexchanger reactionexciationexcitation potentialexcitation sourceexcited stateexciting radiationexcluded volumeexclusion principleexergonicexergyexhausterexit splitterexocyclic double bondexoergicexogenousexopositionexothermicexothermic reactionexothermic solutionexothermicityexpansionexpansion coefficientexpansion theoremexpectationexpectation valueexpected valueexperimentexperimentalexplosive rangeexponentexponentialexponential curveexponential distributionexponential functionexposureexposure timeextenderextensibilityextensive propertyexternal combustionexternal phaseexternal pressureextinction coefficientextractextraction solvent