palladium4dA representation of the atomic spectrum of palladium. Ionisation Energies and electron affinity. The electron affinity of palladium is 53.7 kJ mol ‑e ionisation energies ofPalladium possesses a total of 10 valence electrons, which reside in the outermost energy level. The electron confuration of palladium reveals that it has 2 electrons in the 4s orbital, 6