Ununseptium Element Facts

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States
Energies
Oxidation & Electrons
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117 Uus 294 Ununseptium

Name: Ununseptium
Type: Halogen
Density @ 293 K: g/cm³

Discovery of Ununseptium
In 2009, the first atoms of element 117 were made in the Flerov Laboratory of Nuclear Reactions in Dubna, Russia. Evidence of the synthesis was published in April 2010, by scientific teams from Russia and the United States of America. ^{(1), (2)}

The research effort, led by Yuri Oganessian, was a collaboration between the Joint Institute of Nuclear Research (Dubna, Russia); the Research Institute for Advanced Reactors, Dimitrovgrad; Lawrence Livermore National Laboratory; Oak Ridge National Laboratory; Vanderbilt University, Tennessee; and the University of Nevada, Las Vegas.

The discovery has not yet been verified by IUPAC. Ununseptium's place in the periodic table is unofficial until IUPAC validates its existence.

Ununseptium was made by a fusion reaction of element 20 with element 97: calcium-48 with berkelium-249.

Calcium ions were formed into a beam in a cyclotron (a particle accelerator) and fired at a target layer of berkelium deposited 300 nm thick on titanium foil.

The first bombardment lasted 70 days. The berkelium was bombarded with over 7 trillion calcium-48 ions per second, accelerated to about 10% of the speed of light.

The data suggest five nuclei of interest were produced during the 70 day bombardment. As a consequence of the high energy of the impacts that created them, these nuclei instantly lost thermal energy by emitting four neutrons to form ununseptium-293.

The ununseptium-293 (approximate half-life 14 ms) decayed by alpha emission into element 115 (ununpentium). ^{(2), (3)}

Symbol: Uus
Atomic weight: 294
Atomic volume: cm³/mol

State (s, l, g): unknown
Melting point: K   ( ^oC)

Boiling point: K   ( ^oC)

Specific heat capacity: J g^-1 K^-1
Heat of fusion: kJ mol^-1
1^st ionization energy: kJ mol^-1
3^rd ionization energy: kJ mol^-1

Heat of atomization: kJ mol^-1
Heat of vaporization : kJ mol^-1
2^nd ionization energy: kJ mol^-1
Electron affinity: kJ mol^-1

Shells: 2, 8, 18, 32, 32, 18, 7
Minimum oxidation number:
Min. common oxidation no.:
Electronegativity (Pauling Scale):

Electron configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵ (presumed)
Maximum oxidation number:
Max. common oxidation no.:
Polarizability volume: ų

Structure:

Hardness: mohs



Harmful effects:
Ununseptium is harmful due to its radioactivity.

Color:

Characteristics:
Ununseptium is a synthetic radioactive metal and has only been produced in minute amounts.

Uses:
Ununseptium is of research interest only.

Reaction with air:
Reaction with 15 M HNO₃:
Oxide(s):
Hydride(s):

Reaction with 6 M HCl:
Reaction with 6 M NaOH:
Chloride(s):

Atomic radius: pm
Ionic radius (2+ ion): pm
Ionic radius (2- ion): pm

Ionic radius (1+ ion): pm
Ionic radius (3+ ion): pm
Ionic radius (1- ion): pm

Thermal conductivity: W m^-1 K^-1

Electrical conductivity: x 10⁶ S cm^-1