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Atomic Mass and Atomic Number Worksheet Key

Atomic Mass and Atomic Number Worksheet - Key Name of Element Symbol Atomic Number Atomic Mass Protons Neutrons Electrons copper Cu 29 64 29 35 29 tin Sn 50 119 50 69 50 iodine I 53 127 53 74 53 uranium U 92 238 92 146 92 potassium K 19 39 19 20 19 lithium Li 3 7 3 4 3 oxygen O 8 16 8 8 8 ...