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Chemistry, 30.05.2020 01:04 mmlordpepe9256

Which of the following pairs of elements have the same valence electron configuration?

aluminum (Al) and argon (Ar)
arsenic (As) and gallium (Ga)
fluorine (F) and chlorine (Cl)
lithium (Li) and helium (He)

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Which of the following pairs of elements have the same valence electron configuration?

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