Practice question
Question
Which element has the ground state electronic configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³ 4s²?
Explanation
This configuration (Z=23) corresponds to V (period 4, group 5), with 3d³ 4s², distinguishing it from Ti (3d² 4s²), Cr (3d⁵ 4s¹), or Mn (3d⁵ 4s²).
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