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Element or lon Atomic Number Mass Number # of Protons # of Neutrons # of Electrons 7 Li 137 Ba+2 27 19 F- 80 Br
Element or lon Atomic Number Mass Number # of Protons # of Neutrons # of Electrons 7 Li 137 Ba+2 27 19 F- 80 Br 101 Ru+3 52 Cr+2 32 $2 28 Si 12 C 31 PJ
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