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April 18, 2014

Homework Help: chemistry help!!

Posted by Samantha on Tuesday, November 20, 2012 at 5:01pm.

For each of the following pairs, indicate which element has the larger first ionization energy Mg or Al. i put Mg. Repulsion of paired electrons in Mg is more significant than Al's higher effective nuclear charge. but got it wrong.

Al. Repulsion of paired electrons in Al is more significant than Mg's higher effective nuclear charge.

Mg. Repulsion of paired electrons in Mg is more significant than Al's higher effective nuclear charge.

Al. Shielding of the outermost electron of Al is more significant than Mg's higher effective nuclear charge.

Mg. The shielding and higher energy of the 3p1 valence electron of Al is more significant than the increase in the nuclear charge

those are the four choice3s

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