What elements are most likely to form $2^{-}$ $2^(-)$ ions?

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What elements are most likely to form $2^{-}$ $2^(-)$ ions?

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Answer 1 · 2015-05-04T00:04:11

The elements that are most likely to form $2^{-}$ $"2"^-$ ions are the group 16 elements. Their atoms have 6 valence electrons, and need 2 more to have a full valence shell of 8 electrons in order to become stable. When they gain 2 electrons in order to have 8 valence electrons, an octet, they gain a $2^{-}$ $2^-$ charge.

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What elements are most likely to form $2^{-}$ $2^(-)$ ions?

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