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part B 1,2,3
L es Iles 54 elect - 52 -e S 3.5. One of the pes. The other eis _amu. The average isotopes has a isotope has an a) 64.8 b) 63
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€:91 97-01-6107 BD 12 2 74 protons and 10 electrons means son has a +2 corresponds to my charge -. Ion is Mgte. protons and 6

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