Which quantum numbers must be the same for the orbitals that they designate to be degenerate in a one-electron system (such as hydrogen)? A)n, l, and m_l B)n and l only C)l and m_l D)m_l only E)n only

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In a one-electron system like hydrogen, orbitals are degenerate (have the same energy) if they have the same principal quantum number (n). The angular momentum (l) and magnetic (m_l) quantum numbers do not affect degeneracy in such systems, as the energy levels depend solely on n.

Which Quantum Numbers Must Be the Same for the Orbitals