Question

How many stable isotopes does nitrogen have?

Answer 1

Two.

Explanation:

`""^(14)"N"`, which makes up `99.6%` of a typical sample of nitrogen, and `""^(15)"N"`, which makes up `0.4%` of a typical sample of nitrogen. A synthetic isotope, `""^(13)"N"` has a half-life of `"9.965 min"`, and is therefore not stable.

https://en.wikipedia.org/wiki/Nitrogen