In He+, the electron is initially present in an orbital that has no radial nodes but in which the sign of the wave function changes once across a plane. On absorbing a photon with an energy which is 75% of the ground state energy of hydrogen, the electron moves to a higher orbital. Find the sum of principal quantum numbers of the initial and final orbitals of the electron.

In He+, the electron is initially present in an orbital that has no ra

1.	In He+, the electron is initially present in an orbital that has no radial nodes but in which the sign of the wave function changes once across a plane. On absorbing a photon with an energy which is 75% of the ground state energy of hydrogen, the electron moves to a higher orbital. Find the sum of principal quantum numbers of the initial and final orbitals of the electron.
Answer» In $H e^{+}$ , the electron is initially present in an orbital that has no radial nodes but in which the sign of the wave function changes once across a plane. On absorbing a photon with an energy which is 75% of the ground state energy of hydrogen, the electron moves to a higher orbital. Find the sum of principal quantum numbers of the initial and final orbitals of the electron.