In many-electron atoms, which quantum numbers specify the energy of an electron? A)n and l B)n and m_l C)l and m_l D)n and m_s E)n, l, and m_l

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The energy of an electron in a many-electron atom is primarily determined by the principal quantum number (n) and the azimuthal (or angular momentum) quantum number (l). These two quantum numbers define the energy level and sublevel of an electron, respectively.

In Many-Electron Atoms, Which Quantum Numbers Specify the Energy of an Electron