The energy of an electron of `2p_(y)` orbital is

The energy of an electron of 2p_(x) orbital is :

The energy of an electron of 2p_(x) orbital is :

The energy of an electron of 2p_(x) orbital is :

The energy of an electron of 2p_(1) orbital is

The energy of an electron in the 2nd orbit is -3.4 eV. So the energy of an electron in the 4th orbit is

An electron is moving in 3^(rd) orbit of Li^(+2) and its separation energy is y.The separation energy of an electron moving in 2^(nd) orbit of He^(+) is

An electron is moving in 3^(rd) orbit of Li^(+2) and its separation energy is y.The separation energy of an electron moving in 2^(nd) orbit of He^(+) is