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Number of protons: ( 12, 2, 3, 24 )
Number of electrons: ( 12, 3, 2, 24 )
Number of neutrons: ( 12, 2, 3, 24 )
Number of electon shells: ( 3, 2, 12, 24 )
Number of valence electrons: ( 2, 3, 12, 24 )