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Scandium, atomic structure

Scandium, atomic structure

C013/1534

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Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

Scandium (Sc). Diagram of the nuclear composition and electron configuration of an atom of scandium-45 (atomic number: 21), the most common isotope of this element. The nucleus consists of 21 protons (red) and 24 neutrons (blue). Scandium is a transition metal in group 3, period 4, and the d-block of the periodic table. It has a melting point of 1541 degrees Celsius. The trends across the transition metals are due to electrons filling an inner d-subshell (here, within the 3rd ring), shielding the outer electrons from the increasing nuclear charge.

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