Final answer:
The electron configuration of Ti²⁺ is [Ar] 4s² 3d². When two electrons are removed due to the 2+ charge, the resulting configuration is [Ar] 3d², which corresponds to option c) [Ar] 4s² 3d¶.
Step-by-step explanation:
The electron configuration of titanium (Ti) with an atomic number of 22 and a charge of 2+ (Ti²⁺) can be determined by first writing out the electron configuration for the neutral titanium atom and then removing two electrons to account for the 2+ charge.
The electron configuration for neutral titanium is [Ar] 4s² 3d².
When two electrons are removed, they come from the outermost shell, which is the 4s subshell in this case, resulting in an electron configuration of [Ar] 3d².
Therefore, the correct answer is c) [Ar] 4s² 3d¶ as this configuration represents titanium with two fewer electrons.