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3 August, 12:26

Write the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by each:

(a) Cl (b) Na (c) Ca

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  1. 3 August, 12:52
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    Chlorine atom has an atomic number of 17

    Electronic configuration

    Cl = 1s2 2s2 2p6 3s2 3p5

    Cl - = 1s2 2s2 2p6 3s2 3p6

    Soduim atom has an atomic number of 11

    Electronic configuration

    Na = 1s2 2s2 2p6 3s1

    Na + = 1s2 2s2 2p6

    Calcium atom has an atomic number of 20

    Electronic configuration

    Ca = 1s2 2s2 2p6 3s2 3p6 4s2

    Ca2 + = 1s2 2s2 2p6 3s2 3p6
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