[Answered] The newly discovered element Xyyyillium (Xy) has two isotopes: Xy–253 (253.0) amu) and Xy–255 (255.0 amu). Given that the average atomic

The newly discovered element Xyyyillium (Xy) has two isotopes: Xy–253 (253.0) amu) and Xy–255

(255.0 amu). Given that the average atomic mass of Xy is 254.8 amu, what is the percent abundance
of each isotope? Justify your answer.

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