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.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.