- Protons: 26. Iron's atomic number is 26, which means it has 26 protons in its nucleus.

- Neutrons: 30. Fe-56 has a total of 56 nucleons (protons + neutrons), and since it has 26 protons, it must have 30 neutrons.

- Electrons: 26. In a neutral atom, the number of electrons is equal to the number of protons. Therefore, Fe-56 has 26 electrons orbiting its nucleus.