Add your electrons, the 2nd shell can hold up to 8 Be sure to add them one at a time going clock wise. Draw the next shell if you have more electrons to add P:9 N:10. In this model n = ∞ corresponds to the level where the energy holding the electron and the nucleus together is zero. Add the electrons, the first shell can only hold 2 P:9 N:10.
\) is the Rydberg constant in terms of energy, Z is the atom is the atomic number, and n is a positive integer corresponding to the number assigned to the orbit, with n = 1 corresponding to the orbit closest to the nucleus.