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Ununennium and Uue are the temporary systematic IUPAC name and symbol respectively, which are used until the element has been discovered, confirmed, and a permanent name is decided upon. In the periodic table of the elements, it is expected to be an s-block element, an alkali metal , and the first element in the eighth period .
The synthesis of ununennium was first attempted in 1985 by bombarding a sub-microgram target of einsteinium-254 with calcium-48 ions at the superHILAC accelerator at Berkeley, California: 254 99 Es + 48 20 Ca → 302 119 Uue * → no atoms. No atoms were identified, leading to a limiting cross section of 300 nb. [29]
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 ...
So ununennium and element 119 are both correct, and symbols Uue, 119, E119 may all be used in text. ... the collaboration at the JINR discovered 288 115 and 284 113 ...
Unbiunium, also known as eka-actinium or element 121, is a hypothetical chemical element; it has symbol Ubu and atomic number 121. Unbiunium and Ubu are the temporary systematic IUPAC name and symbol respectively, which are used until the element is discovered, confirmed, and a permanent name is decided upon.
When elements beyond oganesson (starting with ununennium, Uue, element 119), are discovered; their systematic name and symbol will presumably be superseded by a trivial name and symbol. Alchemical symbols
As of 4 Jan 2023, conforms MOS:no new elements (no idle pages created; redirects for element names only) . Uue–Uoq (E119–E184) each have an article page by their systematic name.
ununennium ← unbinilium → unbiunium: Atomic number (Z) 120: ... "E118": E1–E118, discovered, existing full set, mentioned here for easy reference "E119": E119, E120