Identify the element with the electron configuration [Ar] 4s² 3d².

The electron configuration [Ar] 4s² 3d² corresponds to the element Titanium (Ti). In this configuration, the notation [Ar] indicates that the core electrons of Argon are included, and the remaining electrons are added in specific orbitals.

Starting from the Argon configuration, the 4s orbital is filled first with 2 electrons, followed by the 3d orbital, which contains 2 electrons in this case. This means that Titanium has a total of 22 electrons: 18 from Argon, 2 in the 4s orbital, and 2 in the 3d orbital.

The specific configuration of Titanium is essential for understanding its chemical properties, such as its ability to exhibit multiple oxidation states and to form compounds with other elements. The configuration highlights that Titanium is positioned in the transition metals section on the periodic table, specifically in group 4.

Other elements listed do not match this electron configuration. Scandium has more electrons and a different configuration; Iron has more electrons in the d orbitals (specifically 3d⁶); and Vanadium has a different configuration with one fewer d electron (3d³). Therefore, the accurate identification of Titanium based on its unique electron configuration