The electron shell of untriennium
|Name, symbol, number:||untriennium, Ute, 139|
|Group, period, block:||N/A, 8, f|
|Standard atomic weight:|||
|Electron configuration:|| [Uuo] 5g186f17p68s2
|Density (near r.t.):||Unknown|
|Discoverer||None of as yet|
|Location discovered||None of as yet|
|Date discovered||None of as yet|
Untriennium, also known as eka-actinium or element 139, is the temporary IUPAC name of a hypothetical superheavy chemical element in the periodic table in the superactinide series that has the temporary symbol Ute and has the atomic number 139. In the periodic table of elements, it is a f-block element. As of 2012, no attempt has been made to synthesize this element.
Currently, untriennium goes under a systematic temporary element name. Since it is very far in the periodic table and has never been synthesized, very little is known about this element. It is also probable that, due to drip instabilities, only the lighter superactinides are physically possible and the periodic table may end soon after the island of stability expected to be centered at element 126.
|Untrioctium • Untriennium • Unquadnilium|