Chemistry, 05.11.2020 19:10 rakanmadi87

The atomic mass of element A is 63.6amu. Theo only naturally occurring isotopes of element A are A-63 and A-65. The percent abundances of element A are closest to? a) 31% A-63 and 69% A-65
b) 50% A-63 and 50% A-65
c) 100% A-63 and 0% A-65
d) 69% A-63 and 31% A-65

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The atomic mass of element A is 63.6amu. Theo only naturally occurring isotopes of element A are A-6...