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Question:

Ionization Energies question?

Okay, the question is: quot;If you take away the most easily removed electron from an Aluminum atom (i.eionization) which orbital would it come from? Briefly explain your choicequot;Would it be 3p, because it is highest energy and far away from the nucleus, and well shielded from the nucleus charge?or would it be 3s because the electrons are paired and the repulsion makes it easiest? Plus it's far away and well shielded from the nucleus?Or is it neither of these? Haha these were just my guessesWhat is the answer? D:

Answer:

Aluminum, as you pointed out, has 2 electrons in the 3s, and 1 electron in the 3pTrying to bust up a full s orbital requires more energy than expected so its the single electron in the 3p that is first removedFor sub-levels, the stability is totally full followed by half-full; recall that the more stable an atom's electron configuration the less likely you'll be able to break it up - or said differently, the more energy it requires to accomplish the change.
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