The radius of the an orbit of hydrogen atom is 0.85nm . Calculate the velocity of 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.

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.

Radius of the fourth orbit in hydrogen atom is 0.85 nm. Calculate the velocity of the electron in this orbit (mass of electron = 9.1 xx 10^(-31) kg) .

The radius of the 5^(th) orbit of hydrogen atom is 13.25 Å . Calculate the wavelength of the electron in the 5 ^(th) orbit.