Question

A. What are the stable isotopes of carbon?

B. What are the stable isotopes of nitrogen?

ahhh help

Answer 1

I'm not sure if this is how this is supposed to be answered but if it helps the amount of neutrons and protons are unequal the isotope is unstable

Answer 2

carbon-12 (12C) and carbon-13 (13C).

nitrogen-14 (14N) and nitrogen-15 (15N)