Diagram of the nuclear composition, electron configuration, and valence orbitals of an atom of gold-197 (atomic number: 79), the most common isotope o
Diagram of the nuclear composition, electron configuration, and valence orbitals of an atom of gold-197 (atomic number: 79), the most common isotope of this element. The nucleus consists of 79 protons (blue) and 118 neutrons (red). Gold is a transition metal in group 11, period 6, and the d-block of the periodic table. It has a melting point of 1064 degrees Celsius. The trends across the transition metals are due to electrons filling an inner d-subshell (here, within the 5th ring), shielding the outer (valence) electrons from the increasing nuclear charge.
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Photo credit: © CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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