Which of the following is the correct electron configuration for titanium (Ti)?

Titanium has 22 electrons. Filling orbitals in order gives 1s² 2s² 2p⁶ 3s² 3p⁶, accounting for 18 electrons; the remaining four fill 4s² and then 3d². Therefore, the correct configuration is choice A, 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d².

AI-written and checked against the verified answer.