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(Solved): What element forms an ion with an electronic configuration of 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6) (or [Ar ...
What element forms an ion with an electronic configuration of 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6) (or [Ar]) and a -2 charge? Give the symbol for the element.
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