Diagram of the nuclear composition, electron configuration, and valence (outer electron) orbitals of an atom of roentgenium-280 (atomic number: 111),
Diagram of the nuclear composition, electron configuration, and valence (outer electron) orbitals of an atom of roentgenium-280 (atomic number: 111), an isotope of this radioactive element. The nucleus consists of 111 protons (blue) and 169 neutrons (red). Named after Wilhelm Roentgen and first synthesised in 1994, this element is a transactinide of unknown properties in group 11, period 7, and the d-block of the periodic table. Roentgenium-280 has a half-life of seconds.
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Photo credit: © CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
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