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Determine the number of unpaired electrons for Indium

Determine the number of unpaired electrons for Indium

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Answer #1

We must identify the electron configuration of Indium first:

[Kr] 4d10 5s2 5p1

Note that [Kr] stands for the electron configuration of Krypton, the most stable noble gas configuration.

From here:

4d10 --> d can have up to 10 electrons, it sisfilled up; has all paired electrons

5s2 --> s is can have 2 electrons, therefore, all filled up, all are paried

5p1 --> p can have up to 6 electrons; we oinly have 1 electron, so it has only one unpaired electron in this shell and overall

Answer is 1 unpaired electron

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