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Diagram of the nuclear composition, electron configuration, and valence (outer electron) orbitals of an atom of seaborgium-271 (atomic number: 106), a
Diagram of the nuclear composition, electron configuration, and valence (outer electron) orbitals of an atom of seaborgium-271 (atomic number: 106), an isotope of this radioactive element. The nucleus consists of 106 protons (blue) and 165 neutrons (red). Seaborgium, named after Glenn Seaborg and first synthesised in 1974, is a transactinide and transition metal in group 6, period 7, and the d-block of the periodic table. Seaborgium-271, the longest-lived isotope of seaborgium, has a half-life of around minutes.
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Photo credit: © CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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