60.0 MB (1.3 MB compressed)
4579 x 4579 pixels
38.9 x 38.9 cm ⏐ 15.3 x 15.3 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Copernicium (Cn). Diagram of the nuclear composition and electron configuration of an atom of copernicium-285 (atomic number: 112), the most stable isotope of this radioactive element. The nucleus consists of 112 protons (red) and 173 neutrons (blue). Copernicium, named after Nicolaus Copernicus and first synthesised in 1996, is a transactinide and transition metal in group 12, period 7, and the d-block of the periodic table. Copernicium-285 has two forms (nuclear isomers), with half-lives of 29 seconds and 8.9 minutes.
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