I know exactly what isotopes are! When I refer to P+ isotopes, you likely think that I am referring to additional protons being added .. this is because you have clearly never done any atomic physics. Two very common methods of comminucating isotope types:
N+, N- (and) N+, P+ both of which mean the same thing. That is to say, P+ = N- ... think nuclear "dell" if you still don't understand what I am saying.
I appreciate your tactfulness in asking whether or not I understand chemistry
. It is extremely difficult to properly convey "tone" over a "toneless" medium.