Express the velocity of the electron in the Bohr model for fundamental constants

(me, e, h, ∈ ₀ ), .the nuclear charge Z, and the quantum number n.

Evaluate the velocity of an electron in the ground states of He ⁺ ion and U ⁹¹⁺ . Compare these velocities with the speed of light c. As the velocity of an object approaches the speed of light, relativistic effects become important. In which kinds of atoms do you expect relativistic effects to be greatest?