Respuesta :
C isotopes is the correct answer. Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number.All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom.
Hope this helps! :)
What you are describing is a difference in the nucleus of neutrons.
Elements: these chemicals are what is on the periodic table.
ions: These have either too many electrons or too few electrons from the elements found on the periodic table.
Nuclei: are the part of the atom found at the center.
The three above are NOT the answer.
The answer is C