What elements are most likely to form 2^(-) ions? | Socratic (2024)

The elements that are most likely to form #"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^-# charge.

This concept is explained in the following video:

Video from: Noel Pauller

What elements are most likely to form 2^(-) ions? | Socratic (2024)
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