The difference between the third and fourth ionization energies of scandium is much larger than the difference between the third and fourth ionization for titanuim. Why???
2007-12-09 06:37:31 · 2 answers · asked by John 3 in Science & Mathematics ➔ Chemistry
Sc is [Ar]4s23d1 while Ti is [Ar]4s23d2. So pulling the fourth electron away from Sc takes it from a filled shell of [Ar], which takes a lot of energy.
2007-12-09 06:45:27 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
Sc = /Ar/ 4s2 3d1
Ti = /Ar/ 4s2 3d2
http://www.soes.soton.ac.uk/staff/pmrp/GY102/module5/m5f9.GIF
once you take the third one it has a full octet, this is harder to pull because its a full shell, when you have spare ones its easier to pull them, the 4th one you are missing one e in Sc, Its far easier to put one than to take one (the Sc wants to have a full octet).
No much else to explain here....
2007-12-09 14:50:46 · answer #2 · answered by brokenipoduser 3 · 0⤊ 0⤋