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5 May, 02:01

Element Yourneighbor (Yn) has an atomic mass of 126 amu and has six known isotopes. Isotope 1 has a mass

of 120 amu and a relative abundance of 8%. Isotope 2 has a mass of 117 amu and a relative abundance of

12 %. Isotope 3 has a mass of 130 amu and a relative abundance of 5%. Isotope 4 has a mass of 125 amu

and a relative abundance of 30%. If isotopes 5 and 6 have the same relative abundance and isotope 6 has a

mass of 131.4 amu, what is the mass of isotope 5 and the relative abundances of isotopes 5 and 6?

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  1. 5 May, 02:07
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    The relative abundance of isotopes 5 and 6 are 22.5 each and the mass of isotope 5 is 127.98
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