Untriennium

Untriennium
The electron shell of untriennium
Appearance
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Chemical properties
Name, symbol, number:	untriennium, Ute, 139
Element category:	Superactinide
Group, period, block:	N/A, 8, f
Standard atomic weight:	[370][1]
Electron configuration:	[Uuo] 5g186f17p68s2 (predicted) 2,8,18,32,50,19,8,2 (predicted)[2]
Phase:	Unknown
Density (near r.t.):	Unknown
Melting point:	Unknown
Boiling point:	Unknown
Oxidation states:	Unknown
Atomic radius:	Unknown
History
Discoverer	None of as yet
Location discovered	None of as yet
Date discovered	None of as yet
Isotopes

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.

HistoryEdit

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.^[3]

NamingEdit

Untriennium is a temporary IUPAC systematic element name derived from the digits 139. Research scientists usually refer to the element simply as element 139.

ReferencesEdit

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