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Answer to Question #322522 in Physical Chemistry for Zoe
Question #322522
How many valence electrons are found in this element with a configuration of 1s2 2s2 2p6 3s2 3p5?
Expert's answer
1s2 2s2 2p6 3s2 3p5;
Only 17 electrons.
Among 17 electrons, only 7 electrons are valence electrons that are situated in the outermost shell: 3s2 3p5.
Answer: 7.
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