nihonium

Also known as eka-thallium, dvi-indium, element 113, ununtrium, ununnubium, Nh

Nihonium is a synthetic chemical element; it has symbol Nh and atomic number 113. It is extremely radioactive: its most stable known isotope, nihonium-286, has a half-life of about 10 seconds. In the periodic table, nihonium is a transactinide element in the p-block. It is a member of period 7 and group 13.

AI overview

Nihonium is a human-made chemical element (symbol Nh, atomic number 113) that is extremely radioactive and breaks down very quickly, with its most stable form lasting only about 10 seconds before decaying. Scientists study it as part of their exploration of the periodic table's heaviest elements, though its extreme instability makes it difficult to observe and use in practical applications.

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Key facts

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Wikidata facts

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element symbol: Uut
Commons category: Nihonium
Commons gallery: Nihonium
atomic number: 113
boiling point: 1130
time of discovery or invention: 2006-00-00
Unicode character: 鉨

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~42 min read

Article

20 sections

Contents

Introduction
History
Early indications
JINR–LLNL collaboration
Riken
Road to confirmation
2004–2008
2009–2015
Approval of discoveries
Naming
Isotopes
Stability and half-lives
Predicted properties
Physical and atomic
Chemical
Experimental chemistry
Notes
References
Bibliography
External links

Nihonium was first reported to have been created in experiments carried out between 14 July and 10 August 2003, by a Russian–American collaboration at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia, working in collaboration with the Lawrence Livermore National Laboratory in Livermore, California, and on 23 July 2004, by a team of Japanese scientists at Riken in Wakō, Japan. The confirmation of their claims in the ensuing years involved independent teams of scientists working in the United States, Germany, Sweden, and China, as well as the original claimants in Russia and Japan. In 2015, the IUPAC/IUPAP Joint Working Party recognised the element and assigned the priority of the discovery and naming rights for the element to Riken. The Riken team suggested the name nihonium in 2016, which was approved in the same year. The name comes from the common Japanese name for .