Oganesson (Ununoctium)

Element 118 : Ununoctium
Atomic Number 118
Atomic Mass Unknown
Electronegativity according to Pauling Unknown
Density 4.9–5.1 g/cm3 ( Estimated)
Melting Point Unknown
Boiling Point 80±30 °C
Van Der Waals radius Unknown
Ionic Radius Unknown
Isotopes Unknown
Electronic Shell [Rn] 5f14 6d10 7s2 7p6
Energy of First Ionisation 839.4 kJ/mol
Discovered Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory(2002)

Ununoctium is a transactinide chemical element with symbol Uuo and atomic number 118. It was first created by a joint team of American and Russian scientists at the Joint Institute for Nuclear Research in Dubna, Russia. Ununoctium is a temporary name and the suggested name is Oganesson which may be formally accepted by the end of 2016.

The element has the highest atomic mass and highest atomic number of all elements in the periodic table. It has the very unstable radioactive atomic nuclei and is predicted to be in a solid state as it has realistic effects. In the periodic table, it is the last element of 7th period and a p-block element. Ununoctium is predicted to have the same properties of elements present in the same group it belonged to.

These kinds of elements are always prepared artificially as they never occur naturally in the Earth’s Crust. As it can never present in the Earth’s crust, there is no need to worry about health effects of it.

Presently, there are no uses or applications except that it is used for research. Biological use of it is yet to be known.


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