Why Does Titanium Have a Higher Ionization Energy Than Vanadium?

AI Thread Summary
Titanium has a higher ionization energy than vanadium despite its lower atomic number due to the effects of electron shielding in the d orbitals. The discussion highlights that the additional electron in vanadium's d shell contributes to increased shielding, which can lower ionization energy. Participants express uncertainty about the role of electron configuration and the d shell in determining ionization energy trends. The conversation emphasizes that traditional models like the Aufbau principle may not adequately explain these anomalies in transition metals. Understanding these factors is essential for grasping the complexities of ionization energy across the d block elements.
crays
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Hi, may i know why is the first row of the d orbitals (starting from scandium to zinc) should such a weird graph of ionization energy against number of protons? Here the proton number 22 element (titanium) has a higher ionization energy than the proton number 23 element (Vanadium). It is not half filled or fully filled. What's the reason?
 
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crays said:
Hi, may i know why is the first row of the d orbitals (starting from scandium to zinc) should such a weird graph of ionization energy against number of protons? Here the proton number 22 element (titanium) has a higher ionization energy than the proton number 23 element (Vanadium). It is not half filled or fully filled. What's the reason?

Probably has something to do with the additional shielding of the valence electrons with the extra electron in the d shell thus causing the IE to become slightly more negative ... Not certain about this.
 
hmmm i guess not, cause the d shell is filled while going across it. Any other answers anyone?
 
What shell do you think the electron comes out of during the ionization of the transition metals?

Hint: Aufbau is NOT your friend in this case.
 
GCT said:
Probably has something to do with the additional shielding of the valence electrons with the extra electron in the d shell thus causing the IE to become slightly more negative ... Not certain about this.

Correct!
 
chemisttree said:
Correct!

Yay!
 
d shell
 

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