SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Manganese (Mn). Diagram of the nuclear composition and electron configuration of an atom of manganese-55 (atomic number: 25), this element's most common isotope. The nucleus consists of 25 protons (red) and 30 neutrons (blue). Manganese is a transition metal in group 7, period 4, and the d-block of the periodic table. It has a melting point of 1246 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.
Model release not required. Property release not required.