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14 February, 22:21

What is the electron configuration for the barium ion (Ba2+) ?

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  1. 14 February, 22:22
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    Since it says 2+, you would do the opposite to the last number in the configuration. for example the configuration would be 2-8-18-18-8 because you would take of the last two because of the 2 + which technically is - 2
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