samadic4onny8pna samadic4onny8pna
  • 25-02-2017
  • Chemistry
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How many valence electrons does helium need to have a filled outermost energy level?

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eramend1984
eramend1984 eramend1984
  • 27-02-2017
             It only needs two. Because, its outermost energy level (1s) is already complete because it has the maximum of two electrons already. 
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