The difference between the third and fourth ionization energies of scandium is much larger than the difference between the third and fourth ionization energies of titanium. why?

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bahjaMcclatchey1183 bahjaMcclatchey1183

14-12-2017
Physics

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The difference between the third and fourth ionization energies of scandium is much larger than the difference between the third and fourth ionization energies of titanium. why?

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ahmedishaal ahmedishaal · Answer 1 · 2017-12-23T13:45:08+01:00

This is because removing three electrons means third ionization energy would leave scandium with a full valence shell that is 3s²3p⁶ and removing a fourth electron would begin to remove electrons from a full valence shell which is very energetically not favorable.

Removing a third and fourth electron from titanium is bringing Ti closer and closer to having an empty 4th energy level and a completely full 3rd energy level. Removing the 4th electron would be very energetically favorable because it would result in a full valence shell.