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15 August, 17:58

How many s electrons does Ca + possess?

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  1. 15 August, 18:21
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    The electron configuration of Ca is

    1s2 2s2 2p6 3s2 3p6 4s2

    So, since Ca + has a positive charge, we know it has one less electron. Therefore the electron configuration is

    1s2 2s2 2p6 3s2 3p6 4s1

    You can take it from there. Just count the numbers next to each s and add them up
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