Ununtrium 113 Uut

Atomic No. Order:

Alphabetic Order:

Periodic Table

2,8,18,32,

32,18,3

B
5

Al
13

Ga
31

In
49

Tl
81

Uut
113

Uht
163

But
213

Ununtrium

Symbol

Uut

eka-thallium, eka-Tl
alkaline-earth metal
Radioactive
Artificially Produced

Atomic Number

113

Relative Atomic Mass
¹²C = 12.0000

[ 284 ]

Significant Atomic Mass

289
Neutrons 176

Atomic Radius pm

First Ionisation Energy
kJ mol ^-1

Electronegativity

Density kg m ^-3

Molar Volume cm ³

Thermal Conductivity
W m ^-1 K ^-1

Melting Point K

Boiling Point K

Phase at Room Temperature

Expected to be a Solid

Number of Isotopes

278 Uut 240 µs
283 Uut 0.147 s
284 Uut 0.48 s

Inner + outer Shells

= 7

Inner + outer Orbitals

= 113

Filling Orbital

7p ¹

Ground State Electron Configuration (unconfirmed)

[Rn]

5f ¹⁴

6d ¹⁰

7p¹

Ground State Electron Configuration with
free Orbitals (n= 5)

0,0,0,0,0,0,5

Ground State Electron Configuration with compressed Orbitals (n= 162)

0,0,0,0,18,54,90

Singularity

280

162

	s	p		d	f	g	h	i	j
1	2
2	2	6
3	2	6		10
4	2	6		10	14
5	2	6		10	14	18
6	2	6		10	14	18	22
7	2	1	5	10	14	18	22	26
8

Term Symbol

²P _1/2

CAS Reg-ID:

54084-70-7

Discovery

²⁸⁸115 -- -> ²⁸⁴113
²⁸⁷115 -- -> ²⁸³113

Scientists from the Glenn T. Seaborg Institute and the Chemical Biology and Nuclear Science Division at the Lawrence Livermore National Laboratory, in collaboration with researchers from the Joint Institute for Nuclear Research in Russia (JINR), have discovered the two newest super heavy elements, element 113 and element 115.
In experiments conducted at the JINR U400 cyclotron with the Dubna gas-filled separator between July 14 and Aug. 10, 2003, the team of scientists observed atomic decay patterns, or chains, that confirm the existence of element 115 and element 113. In these decay chains, element 113 is produced via the alpha decay of element 115. The results have been accepted for publication in the Feb. 1, 2004 issue of Physical Review C.

²⁷⁸113 -- -> ²⁷⁴Rg

On September 28, 2004, a team of Japanese scientists declared that they succeeded in synthesizing the element 113.

Morita et al, Experiment on the Synthesis of Element 113 in the Reaction:

²⁰⁹Bi + ⁷⁰Zn --> ²⁷⁸113 + n

J. Phys. Soc. Jpn. (ext) Vol. 73, No.10, page 2593

If confirmed, the new element, will be the first manmade element created by Japanese, according to Kosuke Morita and his team at Japan's physical and chemical research institute.

The team would have the right to name the superheavy element in the periodic table, and japonium
is a candidate name, Morita said.

Name Derived From

The element does not have a name yet, therefore the systematic IUPAC name is used.

Ununtrium is pronounced as oon-oon-TRI-em

Pure Appl. Chem., Vol. 78, No. 5, pp. 889–904, 2006. Yu.Ts. Oganessian "Synthesis and decay properties of superheavy elements"

http://159.93.28.88/flnr/elm113p.html

http://flerovlab.jinr.ru/flnr/index.html

Livermore Scientists Team With Russia To Discover Elements 113 and 115,
Press Release 2 February 2004.

Uut and Uup Add Their Atomic Mass to Periodic Table
"New York Times", February 1, 2004

On February 2, 2004, scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, along with scientists from the U.S. Department of Energy's Lawrence Livermore National Laboratory, announced the creation of ununtrium. In experiments performed between July 14, 2003 and August 10, 2003, atoms of americium-243 were bombarded with ions of calcium-48 using a device called a cyclotron. This produced one atom of ununpentium-287 and three atoms of ununpentium-288. All four atoms of ununpentium quickly decayed into ununtrium through alpha decay. Ununtrium's most stable isotope, ununtrium-284, has a half-life of about 0.48 seconds. It decays into roentgenium-280 through alpha decay.

Since only a few atoms of ununtrium have ever been produced, it currently has no uses outside of basic scientific research.

http://www.rarf.riken.go.jp/newcontents/contents/research/113.html

http://www.rarf.riken.go.jp/UsersGuide/Nuclear/index.html

APSIDIUM	Created:		2002-09-01		113.pdf
	Page update:		2007-05-21		113.pdf