Masses of Atoms Worksheet

Name Isotope Symbol Atomic Number Mass Number # of Protons # of Neutrons # of Electrons calcium-40 12 24 1 2 30 26 201 80 17 18 Part B – Average Atomic Mass. Find the average atomic mass of copper if 7 atoms out of 10 are copper-63 and 3 atoms out of 10 are copper-65. ................
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