Alright, this is basic stuff, but I'm REALLY struggling with it, so if anyone could shed some light on these issues, it would be appreciated:

1) Find the binding energy of N-13 nucleus, if the isotope of N-14 is more stable, what is the equation for the expected decay reaction.

Okay so, for this question, I can get the binding energy part easily by using E=mc^2, but it's the latter part of the question I don't understand. We only learned about alpha, Beta (2 types), and gamma decay. None of those will get the N-13 to N-14

2.) The half-life of N-13 is 10 min. If a sample contains 3.3 * 10^ 12 at t = 0, how many N-13 nuclei are still present 40 min. later?

And this one... is just a blur...