An atom x contains 14 protons, 13 electrons, and 12 neutrons, and atom y contains 14 protons, 14 electrons, and 12 neutrons. what can you conclude?
a. x and y are atoms of the same element.
b. x and y are both ions.
c. x and y both have filled valence shells.
d. y is an ion but x is not.
e. x and y are isotopes of the same element.
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