Answer: An atom that has more neutrons than it is supposed to have is called an isotope
Step-by-step explanation:
An isotope is a variant of a chemical element that has the same number of protons in its atomic nucleus as the element, but a different number of neutrons. This means that isotopes of a given element have the same atomic number, but a different atomic mass.
An ion, on the other hand, is an atom or molecule that has gained or lost one or more valence electrons, giving it a net positive or negative charge. Ions can be either atoms or molecules, and can be either monatomic (single atoms) or polyatomic (multiple atoms bonded together).
So, to summarize: isotopes are atoms that have a different number of neutrons than the standard isotope of that element, while ions are atoms or molecules that have gained or lost valence electrons and therefore have a net charge.