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.