Why third ionization of Be larger than Mg?

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Why third ionization of Be larger than Mg?

Postby Chem_Mod » Sat Sep 10, 2011 12:36 am

Question: Why does the third ionization energy Be have a larger value than the third ionization energy of Mg?

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Re: Why third ionization of Be larger than Mg?

Postby Chem_Mod » Sat Sep 10, 2011 12:36 am

Answer: Consider the effective nuclear charge for each of the cations. Look at which one will be easier to ionize, in this case, it is Mg because the effective nuclear charge felt by the valence electrons will be less than the effective nuclear charge felt by the valence electrons in the Be cation.


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