Final answer:
The correct electron configuration for titanium (Ti) is A) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d², following the order of orbital filling dictated by the Aufbau principle.
Step-by-step explanation:
The correct configuration notation for the element titanium (Ti), atomic number 22, is A) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d². This notation reflects the order of filling of electron orbitals according to the Aufbau principle. The 4s orbital is filled before the 3d orbital starts to fill, which occurs after the 1s, 2s, and 2p orbitals are fully occupied. Since titanium has 22 electrons, the first 20 electrons fill the orbitals up to 3p⁶, and the last two electrons go into the 4s² orbital. The 3d orbitals are filled next, and for titanium, the first two of these are filled, giving the final notation of 4s² 3d².