chemistry

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Using a periodic table, determine the number of electrons held in energy levels 1-3 of each atom.

B----2 in level 1--3 in level 2--0 in level 3

C--2 in level 1--4 in level 2--0 in level 3

Mg--2 in level 1--8 in level 2--2 in level 3

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    all ok.

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