Arrange the energy of the 2s orbital for hydr | vedclass

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(B) The energy of an orbital in a multi-electron atom depends on the effective nuclear charge $(Z_{eff})$. As the atomic number $(Z)$ increases,the at

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$K < Na < Li < H$

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(B) The energy of an orbital in a multi-electron atom depends on the effective nuclear charge $(Z_{eff})$. As the atomic number $(Z)$ increases,the attraction between the nucleus and the electron increases,which lowers the energy of the orbital. For the $2s$ orbital,the energy decreases as the nuclear charge increases. Therefore,the order of energy is $E_{2s}(H) > E_{2s}(Li) > E_{2s}(Na) > E_{2s}(K)$.

Arrange the energy of the $2s$ orbital for hydrogen,lithium,sodium,and potassium in increasing order.

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