which of the following is the correct electron configuration for titanium (ti)?\n1s²2s²2p⁶3s²3p⁶4s²3d²\n1s²2s…

which of the following is the correct electron configuration for titanium (ti)?\n1s²2s²2p⁶3s²3p⁶4s²3d²\n1s²2s²2p⁶3s²3p⁶3d⁴\n1s²2s²2p⁶3s²3p⁶4s²4p²
Answer
Brief Explanations:
Titanium has an atomic number of 22. Electrons fill orbitals in the order 1s, 2s, 2p, 3s, 3p, 4s, 3d etc. The 4s orbital fills before the 3d orbital. For 22 electrons, the electron - configuration is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{2}$.
Answer:
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{2}$ (first option)