sasMit5cheetere sasMit5cheetere
  • 21-10-2016
  • Chemistry
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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

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Hussain514 Hussain514
  • 30-10-2016
A. Helium atomic number 2
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