I believe the answer is D. An ion always has a positive or a negative charge. An Ion is an atom with net electric charge due to the loss or gain of one or more electrons. An isotope is each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their neutron, thus they differ in relative atomic mass but not in chemical properties.
The answer is NOT C. I took the test and got it wrong.
Explanation:
<em>An ion always has a positive or a negative charge is the main difference between an isotope and an ion.</em>
when an atom wants to become stable it will give the less amount of valence electrons because it takes too much energy to take 5 or 6 electrons etc. others it takes too much energy to give away 5 or 6 electrons.
The correct answer to your question would be answer D.
