Ununtrium

113

Uut

(293)

  • Name: Ununtrium
  • Symbol: Uut
  • Atomic number: 113
  • Atomic weight: (293)
  • CAS Registry ID: 54084-70-7
  • Group name: (none)
  • Period number: 7
  • Block: p-block
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Description

Ununtrium is a synthetic element that is predicted to be a poor metal. It has an atomic weight of 293, and its appearance is predicted to be a silver or grey color in its presumed solid state. There is not much information on this new element’s chemical traits and characteristics. From the few minute quantities that have been synthesized, the information that was gleaned from the brief existence of ununtrium lead to the prediction that it may be a soft reactive metal that is similar to sodium.

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Isolation

Ununtrium does not exist in nature in any type of form. It can only be synthesized in very minute quantities for brief amounts of time.

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The first synthesis of ununtrium used the isotopic forms of americium and californium. During the reaction, the isotope, number 243, of americium was reacted with the isotope, number 48, of californium to produce three nuclei of ununbium in isotope, number 288, form and four neutrons; this procedure also produce one nuclei of the isotope, number 287, of ununbium and one neutron. Once the ununbium was formed, in a matter of milliseconds it underwent decay releasing alpha particles which produced isotopic forms of the element helium. These isotopic forms of helium also decayed in a matter of milliseconds to produce different isotopic forms of ununtrium. The synthesis of this element did not take place until 2004, and it was successfully synthesized again in 2006. Ununtrium may never be isolated in a form in which it can be studied as it can only be synthesized in such tiny amounts at one time.


General
Name Ununtrium
Symbol Uut
Number 113
Chemical series poor metals
Group 13
Period 7
Block p
Appearance unknown
Standard atomic weight (293)  g·mol−1
Electron configuration unknown
Electrons per shell 2, 8, 18, 32, 32, 18, 3
Atomic properties
Crystal structure unknown
Oxidation states
Electronegativity
Ionization energies
(more)
(more)
Atomic radius
Atomic radius (calc.)
Covalent radius
Van der Waals radius
Physical properties
Phase presumed solid
Density (near r.t.)
Liquid density at m.p.
Melting point
Boiling point
Critical point
Heat of fusion
Heat of vaporization
Heat capacity
Miscellaneous
Magnetic ordering
Electrical resistivity
Thermal conductivity
Thermal expansion
Speed of sound (thin rod)
Young's modulus
Shear modulus
Bulk modulus
Poisson ratio
Mohs hardness
Vickers hardness
Brinell hardness
CAS registry number 54084-70-7

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