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A hypothetical element has an atomic weight of 44.8654 amu. There are three main isotopes of this element, with mass number of 43, 45, and 46. The 46 amu isotope has a 7% abundance. What is the percentage abundance of the isotope with the mass number 43? 1) 10.83% 2) 46.50% 3) 6.730% 4) 90.37% 5) 10.53% 6) 10.23% 7) 89.77% 8) 90.07% 9) 93.27%