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  2. Ununennium - Wikipedia

    en.wikipedia.org/wiki/Ununennium

    This is an accepted version of this page This is the latest accepted revision, reviewed on 9 December 2024. Hypothetical chemical element, symbol Uue and atomic number 119 Chemical element with atomic number 119 (Uue) Ununennium, 119 Uue Theoretical element Ununennium Pronunciation / ˌ uː n. uː n ˈ ɛ n i ə m / ⓘ (OON -oon- EN -ee-əm) Alternative names element 119, eka-francium ...

  3. Extended periodic table - Wikipedia

    en.wikipedia.org/wiki/Extended_periodic_table

    The first two elements of period 8 will be ununennium and unbinilium, elements 119 and 120. Their electron configurations should have the 8s orbital being filled. This orbital is relativistically stabilized and contracted; thus, elements 119 and 120 should be more like rubidium and strontium than their immediate neighbours above, francium and ...

  4. Isotopes of ununennium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_ununennium

    Neither element 119 nor element 120 was observed. This implied a limiting cross-section of 65 fb for producing element 119 in these reactions, and 200 fb for element 120. [21] [10] The predicted actual cross section for producing element 119 in this reaction is around 40 fb, which is at the limits of current technology. [20]

  5. Unbinilium - Wikipedia

    en.wikipedia.org/wiki/Unbinilium

    This experiment used a 249 Bk target and a 50 Ti beam to produce element 119, but since 249 Bk decays to 249 Cf with a half-life of about 327 days, both elements 119 and 120 could be searched for simultaneously: 249 97 Bk + 50 22 Ti → 299 119 Uue * → no atoms 249 98 Cf + 50 22 Ti → 299 120 Ubn * → no atoms. Neither element 119 nor ...

  6. Isotopes of unbinilium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_unbinilium

    119 Uue * → no atoms 249 98 Cf + 50 22 Ti → 299 120 Ubn * → no atoms. Neither element 119 nor element 120 was observed. This implied a limiting cross section of 65 fb for producing element 119 in these reactions, and 200 fb for element 120. [22] In May 2021, the JINR announced plans to investigate the 249 Cf+ 50 Ti reaction in their new ...

  7. Moscovium - Wikipedia

    en.wikipedia.org/wiki/Moscovium

    This is an accepted version of this page This is the latest accepted revision, reviewed on 2 December 2024. "Element 115" redirects here. For fictional and conspiracy references to element 115, see Materials science in science fiction. Chemical element with atomic number 115 (Mc) Moscovium, 115 Mc Moscovium Pronunciation / m ɒ ˈ s k oʊ v i ə m / (mos- SKOH -vee-əm) Mass number (data not ...

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  9. Island of stability - Wikipedia

    en.wikipedia.org/wiki/Island_of_stability

    Even so, as physicists started to synthesize elements that are not found in nature, they found the stability decreased as the nuclei became heavier. [17] Thus, they speculated that the periodic table might come to an end. The discoverers of plutonium (element 94) considered naming it "ultimium", thinking it was the last. [18]