60.0 MB (972.5 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
Holmium (Ho). Diagram of the nuclear composition and electron configuration of an atom of holmium-165 (atomic number: 67), the most common isotope of this element. The nucleus consists of 67 protons (red) and 98 neutrons (blue). Holmium is a lanthanide in period 6, and the f-block of the periodic table. It melts at 1461 degrees Celsius. The trend across the lanthanide series arises from the failure of electrons filling an inner f-subshell (here, within the 4th ring) to shield outer electrons from increasing nuclear charge.
Model release not required. Property release not required.