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Chemistry, 10.12.2020 18:40 clebby3056
Fictitious element X has an a average atomic mass of 254.9 and only 2 isotopes, One of its isotopes has an abundance of 72.00 and a mass of 250.9 amu. What is the atomic mass of the second isotope?
265.2
20.80
245.9
251.9
none of the above
all of the above
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Fictitious element X has an a average atomic mass of 254.9 and only 2 isotopes, One of its isotopes...
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