translational energy* / chemical reactivity / reaction energy threshold / excess energy / minimum energy / chemical reactions / chemical change / finite energy threshold / chemical reaction rate / collision energy dependence / chemical kinetics1 / energy needs / translational energy increases / apparent energy threshold / observed threshold energy / collision energy / energy requirements / minimal energy / buffer gas / gas constant / translational energy dependence / chemical dynamics / translational energy requirements / collision energy dependent / energy dependence / chemical nature / energy threshold / chemical kinetics / relative translational energy / translational energy / elementary gas phase bimolecular reaction / threshold energy / activation energy / energy disposal / chemical rearrangement / energies products / neutral products / energy / /