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27 August, 06:37

How many core electrons does magnesium (Mg) have?

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Answers (2)
  1. 27 August, 07:15
    0
    10

    Explanation:

    Mg is element No. 12.

    It has 12 electrons, with a shell configuration of 2, 8, 2.

    The last two electrons are the valence electrons; the remaining 10 electrons are the inner or core electrons.
  2. 27 August, 09:13
    0
    Hence Mg has 10 core electrons and 2 valence electrons. The number of core electrons depends on the period (row) in which the element is found.
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