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26 August, 17:39

Which of the following ions came from an atom that gained 2 electrons?

A. 0^2-

B. Li+

C. Mg^3+

D. N^3-

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Answers (1)
  1. 26 August, 19:32
    0
    Group 6 elements like Oxygen like to take on the extra two electrons to become a 2 - anion and take on the noble gas configuration. so the O^2-, which looks like O=O, will have two oxygens sharing two electrons ... answer is O^2-
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