The energy of an electron in the 3rd orbit of an atom is `-E`. The energy of an electron in the first orbit will be

The energy of electron in 3rd orbit of hydrogen atom is:

The energy of the electron in the third orbit of H-atom is -1.51 eV. The energy of the electron in first orbit is

The energy of an electron in the second Bohr orbit of H-atomis -E. The enrgy of the electron in the Bohr's first orbit is