The number of protons in X would be 6 while that of Y would also be 6. Thus, the two atoms would be isotopes of the same element.
<h3>Atomic properties of atoms</h3>
The mass number of an atom is the sum of protons and neutrons present in the atom.
For X with mass number 12 and neutron number 6, the number of protons would be:
12 - 6 = 6 protons
For Y with mass number 13 and neutron number 7, the number of protons would be:
13 - 7 = 6 protons.
Thus, both atoms have the same number of protons, meaning that they are likely isotopes of the same element.
More on isotopes of elements can be found here; brainly.com/question/21536220
