What is the velocity of the electron ?

The velocity of an electron in the fourth Bohr's orbit of hydrogen is v. The velocity of the electron in the first orbit would be :

The radius of the fourth orbit in hydrogen atom is 0.85 nm. Calculate the velocity of the electron in this orbit.

The radius of the fourth orbit in hydrogen atom is 0.85 nm. Calculate the velocity of the electron in this orbit.

Consider an electron revolving in a circular orbit of hydrogen atom, whose quantum number is n=2 The velocity of the electron in that orbit is

It is found experimentally that 13.6 eV energy is required to separate a hydrogen atom into a proton and an electron . Compute the orbital radius and the velocity of the electron in a hydrogen atom.

Calculate the uncertainty in the velocity of an electron, if the uncertainity in position is 100 pm.