Question

Write the Hamiltonian of a multi-electron atom. Obtain an expression for the effective potential experienced by an electron of this atom under the central field approximation. 

19 Jan 2026
Answer :
Word Count : 232
The Hamiltonian of a multi-electron atom with (N) electrons and a nucleus of charge (+Ze) is expressed as the sum of kinetic and potential energies of all particles. It can be written as [ \hat{H} = \sum_{i=1}^{N} \left[ -\frac{\hbar^2}{2m} \nabla_i^2 - \frac{Ze^2}{4 \pi \epsilon_0 r_i} \right] + \sum_{i ______ __________ ____ ________ ______ _________ __________.
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