Nitrogen has 9 known isotopes, but only 2 of them are natural abundances. The two isotopes are N-14 and N-15. N-14 has a large relative abundance of 99.6%, while N-15 has a small relative abundance of .4%. Relative abundance is how common the element. N-14 is a lot more common than N-15. Nitrogen has 8 known ions. Ions mean that Nitrogen has a different charge from losing or gaining electrons. Nitrogen has 5 valence electrons. It has 5 valence electrons because Nitrogen is in Group 15. To find the valence electrons you subtract the group number by 10. 15-10 is 5. Nitrogen has 7 protons. The reason that the atomic number is 7 is because of the amount of protons. Nitrogen has 7 neutrons in its most abundant isotope. In the Bohr Diagram, Nitrogen has 2 energy levels. There is the nucleus, and then the 2 energy level rings.