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Ionization energy/Reactivity.

by NewChemTeache
Tags: energy or reactivity, ionization
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Jan7-13, 08:13 PM
P: 5
I read this here:

The higher the ionization energy, the more difficult it is to remove an electron. Therefore, ionization energy is in indicator of reactivity.

So my question is:

How does this explain the high reactivity of the halogens?

- I understand that they will remove electrons from other elements to achieve a noble gas configuration, but that statement above seems to disagree with how the akali metals can have a low ionization energy and be very reactive and the halogens have a very high ionization energy and be very reactive.

Please explain.

Thank you,
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Jan8-13, 02:31 AM
Borek's Avatar
P: 23,574
Yes, the wording seems to be slightly misleading. Low ionization energy suggests high reactivity, no doubt about it, but high ionization energy not necessarily means non-reactive. Although in most cases it does, as there are many more metals than non-metals in periodic table.

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