The electron configuration of a ground-state vanadium atom is A) [Ar]4s²4d³_. B) [Ar]4s²4p³_. C) [Ar]4s²3d³_. D) [Ar]3d⁵_. E) [Ar]4s²3d⁷_.

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The electron configuration of a ground-state vanadium atom is [Ar]3d3 4s2, which can be simplified as [Ar]4s2 3d3. Choice C correctly shows this configuration as [Ar]4s1U1P1 2S1S1P0 3d1U1P1 3S1S1P0 S1U1B1.S1U1B0. The other choices either have incorrect sublevels or include additional electrons that are not present in a ground-state vanadium atom.

The Electron Configuration of a Ground-State Vanadium Atom Is