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Which orbital is the first to fill with electrons in a given principal energy level?

both d and f



s



f



p



both s and p

User QRohlf
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2 Answers

7 votes
Both S and P. Hope this helps!
User Wilnelia
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2 votes
S is the first to fill, it is represented by the first two columns in the periodic table.
User Bling
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