Answer
The ion symbol for that ion is:
$$N^{3-}$$
Work Step by Step
1. Count the amount of protons (blue spheres with "+" symbol):
There are 7;
2. Identify the element with atomic number 7 on a periodic table:
Nitrogen (N)
3. Calcule the net charge:
Charge = Number of protons - Number of electrons
Charge = 7 - 10 = -3
