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March 5, 2015

Homework Help: chemistry final-urgent

Posted by lianne on Tuesday, December 14, 2010 at 6:55am.

Choose the element with the highest ionization energy element: Na, Mg, Al, P, S

In my book: ionization energy increase from left to right and bottom to top.

Na<Mg<Al<P<S
S is highest ionization energy?
my instructor review this problem and his answer is P is a highest ionization. Please explain

Thank you for your help

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