One way that I remember how to find protons, electrons, and neutrons, is that the protons are equal to the atomic number, the number of electrons is equal to the number of protons, and the neutrons are equal to the atomic mass minus the atomic number.
The charge on a proton and electron are the same and it is = 1.6 × 10⁻¹⁹ C
The net charge electric charge of an iron atom = (number of proton × charge on a proton) + ( number of electron × charge on an electron ) = 26 (e) + 8 (-e) = 26 e - 8 e = 18 e = 18 × 1.6 × 10⁻¹⁹ C = 2.88 × 10⁻¹⁸ C
