What is the order of speed of electrons in a hydrogen atom in ground state?

Fill ups: The total energy possessed by an electron in hydrogen atom in ground state is……………. .

(a) Using the Bohr's model calculate speed of electron in hydrogen atom in the n = 1, 2, and 3 levels. (b) Calculate the orbital period in each of these levels.

The energy of seperation of an electron in a hydrogen like atom in excited state is 3.4eV. The de-Broglie wave length (in Å) associtated with the electron is :

What is the electronic configuration of a hydrogen atom ?

The energy of an electron in nth orbit of hydrogen atom is