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24 November, 15:46

3. Look at the positions of calcium, beryllium, and magnesium on the periodic table. Based on their locations, predict how many valence electrons these elements have and predict what the reactivity of these elements will generally be.

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  1. 24 November, 16:10
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    Ca = 2 ve

    Be=2 ve

    Mg=2 ve because they are in Group 2a.

    They are slightly less reactive than Group 1a, but more dense that Group 1a.
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