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How many valence electrons are in the outermost energy level of each of the following elements? A. Helium B. Lithium C. Nitrogen D. Magnesium

How many valence electrons are in the outermost energy level of each of the following elements? A. Helium B. Lithium C. Nitrogen D. Magnesium
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How many valence electrons are in the outermost energy level of each of the following elements? A. Helium B. Lithium C. Nitrogen D. Magnesium

User Marco Ancona
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A. Helium atomic number 2
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User Mohammad Naji
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