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Topic: ionization energy.  (Read 3833 times)

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Offline XxslbabesxX

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ionization energy.
« on: November 08, 2005, 09:28:08 PM »
Can someone explain to me why Sulfur has a lower first ionization energy than Phosphorus?

Also do group differences make more of a difference than does period differences when it comes to things like electron affinity and ionization energy.

Thanks!

Blueshawk

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Re: ionization energy.
« Reply #1 on: November 08, 2005, 10:41:18 PM »
It could be due the their electron affinity.

Electron Affinity of P is 71.7 kJ/mol

Electron Affinity of S is 200.4 kJ/mol

Therefore P has less ability or want to hold onto electrons, therefore the electrons are more easily removed and the energy potential is therefore greater.


Offline Mitch

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Re: ionization energy.
« Reply #2 on: November 08, 2005, 11:06:57 PM »
Your numbers seem to indicate the opposite. One should note that electron affinity = -(delta h)
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