60.0 MB (526.1 KB compressed)
4579 x 4579 pixels
38.9 x 38.9 cm ⏐ 15.3 x 15.3 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Iron (Fe). Diagram of the nuclear composition and electron configuration of an atom of iron-56 (atomic number: 26), the most common isotope of this element. The nucleus consists of 26 protons (red) and 30 neutrons (blue). Iron is a transition metal in group 8, period 4, and the d-block of the periodic table. It has a melting point of 1538 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.