ununtri

Ununtri, also known as eka-thallium, is a synthetic chemical element with the symbol Uut and atomic number 113. It is a highly radioactive element and is part of the pnictogen group on the periodic table. Ununtri was first synthesized in 2004 by a team of Russian and American scientists at the Joint Institute for Nuclear Research in Dubna, Russia. The discovery was confirmed in 2005 by the International Union of Pure and Applied Chemistry (IUPAC).

The element was named ununtrium, derived from the Latin words "unus" meaning one and "tri" meaning three, reflecting its atomic number. The name was temporary and was intended to be replaced once more information about the element was known. However, the IUPAC has not yet officially approved a permanent name for ununtri.

Ununtri is expected to have similar chemical properties to its lighter homologues, thallium and nitrogen, due to its position in the periodic table. It is expected to be a solid at room temperature and to form compounds with oxidation states of +1, +3, and possibly +5. The most stable isotope of ununtri, ununtri-286, has a half-life of approximately 20 milliseconds.

Due to its short half-life and the difficulty in producing and studying it, very little is known about ununtri. It is primarily of interest to scientists for its role in understanding the structure of the periodic table and the properties of superheavy elements. The synthesis of ununtri and other superheavy elements is a complex process that involves accelerating beams of ions and colliding them with target materials to create new elements.