Hey there!
The atomic number is the number of protons, so the atomic number of this iron ion is 26.
The atomic mass is the sum of protons and neutrons, so the atomic mass is 26 + 36 = 62 amu.
The net charge is the difference between the protons and the neutrons, so the net charge is 26 - 26 = 0. Which means that this "iron ion" is in fact not an ion.
Hope this helps!
