Ununseptium (Uus). Diagram of the nuclear composition,electron configuration,chemical data,and valence (outer electron) orbitals of an atom of ununseptium-294 (atomic number: 117),the most stable isotope of this radioactive element. The nucleus consists of 117 protons (red) and 177 neutrons (orange). 117 electrons (white) successively occupy available electron shells (rings). Ununseptium is a temporary name (2010 synthesis not yet official). It is a transactinide of unknown properties in group 17,period 7,and the p-block of the periodic table. The ununseptium-294 nucleus (half-life: 78 milliseconds) emits an alpha particle to form ununpentium-290 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Clarivan, Carlos |
Bildgröße: | 5197 px × 5008 px |
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