A certain element contains 75% of an isotope of mass number X and 25% of an isotope of mass number Y. Select one or more:
The atomic weight of the element is closer to X than it is to Y.
The atomic weight of the element is closer to Y than it is to X.
The element is Manganese [atomic number 25).
The element is Osmium [atomic number 75).
The element is Tin [atomic number 50).
There is not enough information to tell which element is represented.
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A certain element contains 75% of an isotope of mass number X and 25% of an isotope of mass number Y...
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