What does the energy of an orbital in a multi electron atom depend on?

<p>In a hydrogen atom, which we know has a single electron, the orbital energy will only depend on the principal quantum number (n). Here, the orbitals like 2s and 2p have the same energy (degenerate).</p><p>It's a little different with multielectron atoms. The energy depends on both n and the azimuthal quantum number (l). This causes splitting. And, the energies increase in the order: s &lt; p &lt; d &lt; f.</p>

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