Palladium (Pd). Diagram of the nuclear composition and electron configuration of an atom of palladium-106 (atomic number: 46), the most common isotope
Palladium (Pd). Diagram of the nuclear composition and electron configuration of an atom of palladium-106 (atomic number: 46), the most common isotope of this element. The nucleus consists of 46 protons (red) and 60 neutrons (yellow). 46 electrons (white) bind to the nucleus, successively occupying available electron shells (rings). Palladium is a transition metal in group 10, period 5, and the d-block of the periodic table. It has a melting point of 1555 degrees Celsius. The transition metal trends are due to electrons filling an inner d-subshell (here, within the 4th ring), shielding the outer electrons from the increasing nuclear charge.
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Photo credit: © CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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