# Ionization Energy Trends

There is a large increase in ionization energy when an electron is removed from a p orbital versus when it is removed from a s orbital (and likewise when it is removed from the valence shell and from the inner shells). Why is there a smaller increase when successive electrons are removed from the same subshell? (shouldn't the ionization energy change by the same amount / have the same slope as the large increase?)

Thank you.

mjc123
Homework Helper
There is a large increase in ionization energy when an electron is removed from a p orbital versus when it is removed from a s orbital
Is there?

etotheipi
Is there?
Yes I think, though it isn't as noticeable as when it is removed from the valence shell versus from the inner shells (when looking at ionization energy graphs). Can you correct where my process went wrong? Thanks.

mjc123
Homework Helper
Can you give some examples?

Can you give some examples?
There is a much higher ionization energy for Be (899.5) than B (800.6) Can you correct me now if there's anything wrong? Thank you!

Borek
Mentor
900 vs 800 is not a substantial difference, same ballpark.

There is a large increase in ionization energy when an electron is removed from the valence shell versus from the inner shells. Why is there a smaller increase when successive electrons are removed from the same shell? (shouldn't the ionization energy change by the same amount / have the same slope as the large increase?)
Can anyone answer my revised question now? Thanks.

mjc123
Homework Helper
"(shouldn't the ionization energy change by the same amount / have the same slope as the large increase?)"
No. Why should it?

"There is a large increase in ionization energy when an electron is removed from the valence shell versus from the inner shells."
This is not true. I realise English may not be your first language, but what you write seems to mean the opposite of what you intend. "There is a large increase in A versus B" implies that A is greater than B, B being the standard of comparison. You appear to mean "There is a large increase in going from A to B", i.e. B is greater than A. Better to say plainly "B is bigger than A".

Thank you for teaching me how to write properly. I have greatly learned from your explanations on how to consistently pose questions and not answer the question directly. I understand the question now and no longer need help.

mjc123