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Is a reasonable ground-state electron configuration 1s22s22p43s2 1s21p62s22p6 1s22s22p63s23p64s24d10 1s22s22p63s23p64s23d5?
Updated: 5/13/2025
The reasonable ground-state electron configuration among the options provided is 1s²2s²2p⁶3s²3p⁶4s²3d⁵. This configuration corresponds to manganese (atomic number 25) and reflects the correct filling order of orbitals according to the Aufbau principle, Hund's rule, and the Pauli exclusion principle. The other configurations either exceed the allowed number of electrons in certain orbitals or are not in the correct order of filling.
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