Hydrogen atom will be in its ground state , if its electrons is in

The hydrogen atom is said to be in its ground state when the orbital electron

The radius of hydrogen atom, in its ground state, is of the order of

An electron colliodes with a hydrogen atom in its ground state and excites it to n=3 state . The energy given to the hydrogen atom in this inelastic collision ( neglecting the recoil of hydrogen atom ) is

In hydrogen atom, an electron in its ground state absorbs two times of the energy as if requires escaping (13.6 eV) from the atom. The wavelength of the emitted electron will be

In hydrogen atom, an electron in its ground state absorbs two times of the energy as if requires escaping (13.6 eV) from the atom. The wavelength of the emitted electron will be

A hydrogen atom is in its ground state absorbs a photon. The maximum energy of such a photon is:

The first excited state of hydrogen atom is 10.2 eV above its ground state. The temperature is needed to excite hydrogen atoms to first excited level is