Final answer:
The electron configuration 1s²2s²2p⁶6s²3s²3p⁶4s²3d¹ belongs to the element Scandium (Sc), and not to any of the options provided in the question. Scandium is a transition metal in the first transition series.
Step-by-step explanation:
The element with an electron configuration of 1s²2s²2p⁶6s²3s²3p⁶4s²3d¹ is Scandium (Sc), with an atomic number of 21. This electron configuration shows that the atom fills the 4s orbital before starting to fill the 3d subshell, which is characteristic of the elements in the first transition series of the periodic table. The given configuration includes a filled 4s orbital and a partially filled 3d subshell, indicating that it belongs to a transition metal in the fourth period. Since choice B, Vanadium (V), has a [Ar] 3d³ 4s² electron configuration, it does not match the given electron configuration. The correct answer is not listed in the options provided.