In a multi-electron system,the energy of an e | vedclass

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(D) In a multi-electron system,orbitals belonging to the same subshell (having the same principal quantum number $n$ and azimuthal quantum number $l$)

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Same as that of $2p_x$ and $2p_z$ orbital

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(D) In a multi-electron system,orbitals belonging to the same subshell (having the same principal quantum number $n$ and azimuthal quantum number $l$) are degenerate in the absence of an external magnetic or electric field.Since $2p_x$,$2p_y$,and $2p_z$ all belong to the $2p$ subshell $(n=2, l=1)$,they have the same energy.Therefore,$E(2p_x) = E(2p_y) = E(2p_z)$.

In a multi-electron system,the energy of an electron of $2p_y$ orbital is :-

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