Ionisation energy

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Offline thegers91

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Ionisation energy
« on: 28/11/2007 18:53:36 »
The second ionisation energy of each alkali metal is much greater than that of the halogen in the same period

Why is this?

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Offline lightarrow

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Ionisation energy
« Reply #1 on: 29/11/2007 08:55:04 »
The second ionisation energy of each alkali metal is much greater than that of the halogen in the same period

Why is this?
Because in the first case you have to remove an electron from a complete shell, that is, from orbitals where electrons are tightly bonded.

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Offline thegers91

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Ionisation energy
« Reply #2 on: 29/11/2007 20:34:17 »
thanks lightarrow muchly appreciated!!! :)