# Why do isotopes have different chemical reaction rates? [duplicate]

Isotopes of a given element differ in the rates at which they undergo chemical reaction.

Why is this so? The only explanation I could think of is that the gravitational force on the electrons increases and hence the electrons are better bound to he nucleus. But this force is very negligible.

Is there perhaps another contributing factor?

• Gravity is not relevant, inertia is. Jun 13 '20 at 14:20