In which energy level are valence electrons located?

1 answer:

4 0

Elements in the first row (hydrogen and helium) will have outer electrons in the first energy level. Their principal quantum number is 1. Elements in the second row (lithium through neon) will have valence electrons in the second energy level with a principal quantum number of 2.

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Answer:

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Explanation:

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Hence, option B is correct

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