What is the electron configuration of a ground-state Nb²⁺ ion? A) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹ B) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶4d³ C) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹4d² D) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶4d⁵ E) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d³

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Quizplus · Accepted Answer

The electron configuration of a neutral Nb atom is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d4. First, the ion will form by losing one electron from the 5s orbital, leaving behind 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s0 4d4. Then, the Nb^{2+ ion will form by removing one more electron from the 4p orbital, leaving behind 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5 5s0 4d4.
Finally, the U1S1P0 ion will form by removing one electron from the 4d orbital, leaving behind 1s2 2s2 2p6 3s2 3p6 4s2 3d9 4p5 5s0 4d4.
Therefore, the electron configuration of the Nb²⁺ ion is:
1s2 2s2 2p6 3s2 3p6 4s2 3d9 4p5 5s0 4d4 (U1S1P0) +
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s0 4d4 (}) + 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s0 4d3 (Nb^{2+) =
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s0 4d3 5p1 6s0 4f0 (Nb²⁺)

Only choice B matches this configuration.}

What Is the Electron Configuration of a Ground-State Nb2+ Ion

What Is the Electron Configuration of a Ground-State Nb²⁺ Ion