Kinetic Isotope Effect
Kinetic Fractionation
Isotopic Fractionation
Isotope Separation
Insertion Reaction
Proton Transfer
De-Protonation
Neutron-Hydrogen Transfer

https://en.m.wikipedia.org/wiki/Protonation

https://en.m.wikipedia.org/wiki/Deprotonation

https://en.m.wikipedia.org/wiki/Magic_acid

https://en.m.wikipedia.org/wiki/Hydride

https://en.m.wikipedia.org/wiki/Hydron_(chemistry)

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Difference Between Primary and Secondary Kinetic Isotope Effect

https://www.differencebetween.com/difference-between-primary-and-secondary-kinetic-isotope-effect/

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https://en.m.wikipedia.org/wiki/Kinetic_isotope_effect

https://en.m.wikipedia.org/wiki/Equilibrium_fractionation

In general, the light elements (especially hydrogen, boron, carbon, nitrogen, oxygen and sulfur) are most susceptible to fractionation