Protons, Neutrons, and Electrons Practice Worksheet
Write the complete chemical symbol for the ion with 31 protons, 39 neutrons, and 28 electrons. Ga: 31 bottom left 70 top left +3 top right. Name of Element Element Symbol Mass Number. Atomic. Number Protons. Neutrons. Electrons. Boron B 11 5 5 6 5 Sodium Na 24 11 11 13 11 Gallium Ga 68 31 31 37 31 Yttrium Y 89 39 39 128 39 Copper Cu 64 29 ................
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