Calculate the speed of the electron revolving around the nucleus of a hydrogen atom in order that it may not be pulled into the nuclues by electrostatic attraction.

Why are electrons revolving around the nucleus?

Determine the speed of the electron in the n=3 orbit of hydrogen atom.

An electron is circulating around the nucleus of a hydrogen ato in a circular orbit of radius 5.3 cxx10^-11 m. Calculate the electric potential at this radius

Calculate the energy required to excite an electron from first orbit of the hydrogen atom to the third orbit?

Calculate the magnitude of the electrostatic force exerted by the proton on the electron in the hydrogen atom and compare it with the weight of the electron. Given that mass of electron is 9.1 xx 10^-31 kg, charge on electron is 1.6 xx 10^-19 C and radius of hydrogen atom is 0.53 overset(@)A .