What is the difference between the 2s orbital | vedclass

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Question

(A) In a hydrogen atom,the energy of an orbital depends only on the principal quantum number $(n)$. Therefore,$2s$ and $2p$ orbitals have the same ene

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The $2s$ orbital of hydrogen has higher energy.

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(A) In a hydrogen atom,the energy of an orbital depends only on the principal quantum number $(n)$. Therefore,$2s$ and $2p$ orbitals have the same energy (degenerate).In multi-electron atoms,the energy of an orbital depends on both $n$ and $l$ (azimuthal quantum number). Due to shielding effects,the $2s$ orbital has lower energy than the $2p$ orbital.Specifically,the $2s$ orbital of hydrogen has higher energy than the $2s$ orbital of other atoms because the effective nuclear charge $(Z_{eff})$ in multi-electron atoms is higher,which stabilizes the $2s$ orbital.

What is the difference between the $2s$ orbital of hydrogen and the $2s$ orbital of other multi-electron atoms?

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