sciencefairadventure
112 Uub (288)

Ununbium

Transition metal
Symbol Uub
Atomic Number 112
Atomic Weight (288)
CAS Registry ID 54084-26-3
Group Name (none)
Period Number 7
Block d-block
State at STP Solid

Description

Sample of Ununbium โŒ• Enlarge Image

Ununbium is a synthetic element that is categorized as a transition metal. It is predicted to be a grey metallic colored liquid or possibly a colorless gas. The atomic weight of ununbium is 288, and the melting point and boiling points are not yet known. While not much is known about the chemical characteristic of ununbium, it is predicted to have similar chemical properties to mercury; for this reason ununbium is sometimes referred to as eka-mercury. There are no known commercial uses of ununbium at this time.

Isolation

Ununbium does not exist in nature in any type of form. This element can only be synthesized in minute quantities using specialized equipment and procedures.

Ununbium โŒ• Enlarge Image

Ununbium has only been synthesized a few times in its brief history. It is considered to be a super heavy element, and in the future with more studies it may be found to be more similar to a noble gas than a liquid like mercury. Ununbium was synthesized for the first time in 1996. During this time, it was produced using isotopic forms of zinc and lead; the procedure took place in a heavy ion accelerator. During the production of ununbium the nucleus of the isotope, number 70, of zinc was used to bombard a lead target composed of the nucleus of the isotope, number 208, of lead. This led to the production of an isotope of ununbium, number 277, and one neutron; only two nuclei of the ununbium were produced using this method. Ununbium was synthesized again in 2000, 2004, and 2006 in very minute quantities. Different isotopes of ununbium were confirmed before they quickly decayed.

General

NameUnunbium
SymbolUub
Number112
Chemical seriesTransition metal
Group12
Period7
Blockd
Appearanceunknown
Standard atomic weight(288) gยทmolโปยน
Electron configurationunknown
Electrons per shell2, 8, 18, 32, 32, 18, 2

Atomic Properties

Crystal structureunknown
Oxidation states
Electronegativity
Ionization energies
Atomic radius
Atomic radius (calc.)
Covalent radius
Van der Waals radius

Physical Properties

Phasepresumed gas
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