isotope effect

Isotope effect may refer to:

Equilibrium isotope effect, see Equilibrium constant#Effect of isotopic substitution
Isotopic shift, effect of isotopic substitution on spectroscopy
Kinetic isotope effect, effect of isotopic substitution on chemical reaction rates
Magnetic isotope effect, when a chemical reaction involves spin-selective processes, such as the radical pair mechanism
Superconductive transition temperature varying by isotope atomic weight: see BCS theory#Underlying evidence