Diagram of the nuclear composition, electron configuration, and valence (outer electron) orbitals of an atom of dubnium-268 (atomic number: 105), the
Diagram of the nuclear composition, electron configuration, and valence (outer electron) orbitals of an atom of dubnium-268 (atomic number: 105), the most stable isotope of this radioactive element. The nucleus consists of 105 protons (blue) and 163 neutrons (red). Dubnium, named for where it was first synthesised in 1970, is a transactinide and transition metal in group 5, period 7, and the d-block of the periodic table. Dubnium-268 has a half-life of 29 hours, its nucleus stabilising by electron capture to form rutherfordium-268.
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Photo credit: © CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
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