Hello. I have been thinking about this problem for the past few days and have gotten nowhere. I may just be overlooking something, but I really cannot figure it out. In my class, we talked about the split 2p level in XPS of Titanium into 2P3/2 and 2P1/2. We found that the latter has a higher bonding energy, which would imply that it is closer to the ground state, making it more stable than the former. However, this is in violation of Hund's rule #3 which states that the state with the greater J value is more stable. Where does the conflict come from? I am drawing a blank. Any help is greatly appreciated.