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Gold, atomic structure

Gold, atomic structure

C013/1636

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Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

Gold (Au). Diagram of the nuclear composition and electron configuration of an atom of gold-197 (atomic number: 79), the most common isotope of this element. The nucleus consists of 79 protons (red) and 118 neutrons (blue). 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 electrons from the increasing nuclear charge.

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