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Name the dipositive ion represented by c...

Name the dipositive ion represented by configuration : `1s^(2) 2s^(2) 2p^(6)3s^(2)3p^(6)`.

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The dipositive ion is `Ca^(2+)` ion. The configuration of Ca is `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)`.
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