Untriunium

This article is about an undiscovered element. Once it is discovered, this article will be edited with more information.

Untriunium
131Utu
- ↑ Utu ↓ ? Extended periodic table untrinilium ← untriunium → untribium
Appearance
unknown
General properties
Name, symbol, number	untriunium, Utu, 131
Pronunciation	/uːntraɪˈuːniəm/
Element category	superactinides
Group, period, block	N/A, 8, g
Mass number	[404] (predicted)
Electron configuration	[Og] 5g76f28s28p2 (predicted) 2, 8, 18, 32, 39, 20, 8, 4 (predicted)
Physical properties
unknown
Atomic properties
unknown
Most stable isotopes
Main article: Isotopes of untriunium
iso NA half-life DM DE (MeV) DP 404Utu (predicted) syn 0.001 - 1 sec β 403Utu (predicted) syn 0.001 - 1 sec β 359Utu (predicted) syn ~1 sec α 355Ube
v • t • e • r

Untriunium (pron.: /uːntraɪˈuːniəm/), also known as element 131, is the temporary name of a hypothetical superheavy element in the periodic table that has the temporary symbol Utu and atomic number 131. As of 2016, no attempt has been made to synthesize untriunium.

History

As of 2016, no attempt has been made to synthesize untriunium.

Naming

Untriunium is a temporary IUPAC systematic element name derived from the digits 131, where "un-" represents Latin unum meaning "one" and "tri-" from tres meaning "three". Research scientists usually refer to the element simply as element 131. Transuranium elements like this usually end up being named after a scientist or the location of a laboratory that does work in atomic physics.

Extrapolated properties

Atomic and physical

Untriunium
	Atomic weight 348 Protons 131 Neutrons 217

Chemical

Very little is known about the superactinides. Elements in this region are likely to be highly unstable with respect to radioactive decay, and have extremely short half lives (with the possible exception of element 126).

See also

• Untrinilium – Untribium