In the vast and intricate tapestry of scientific discovery, the naming of elements is a blend of tradition, symbolism, and the quest for clarity. Ununseptium, the name given to element 117, is no exception. This article delves into the fascinating story behind the naming of this synthetic element, exploring the history, the process, and the significance of its name.
The Discovery of Element 117
Element 117, with the symbol Uus, was first synthesized in 1970 by a team of scientists at the Joint Institute for Nuclear Research in Dubna, Russia. The discovery was made by bombarding bismuth-209 with calcium-48 ions. The experiment resulted in the detection of a single atom of the new element, which was confirmed by subsequent experiments.
The Naming Process
The naming of elements is governed by the International Union of Pure and Applied Chemistry (IUPAC), the international authority on chemical nomenclature. The process involves several steps:
Temporary Name: After the discovery of a new element, it is given a temporary name, which consists of the Latin word for the number of protons (atomic number) followed by the suffix “-ium.” For element 117, the temporary name was ununseptium (uu).
Suggesting a Name: The discoverers of the element can propose a permanent name to IUPAC. The name must have a scientific basis and be descriptive of the element’s properties or origin.
IUPAC Review: IUPAC reviews the proposed name and considers factors such as historical significance, chemical properties, and the etymology of the name.
Approval: Once approved, the name becomes official and is recognized worldwide.
The Name Ununseptium
The name Ununseptium is derived from the Latin words “unun” (one) and “septem” (seven), reflecting the element’s atomic number, 117. This naming follows the convention used for other elements with atomic numbers in the 100s, such as Ununbium (element 113) and Ununtrium (element 115).
The Discovery of Element 117 in the United States
In 2012, a team of scientists at Lawrence Livermore National Laboratory in the United States synthesized element 117. They named their discovery “tennessine” (Ts), after the state of Tennessee, where the laboratory is located. However, this name was not officially recognized by IUPAC.
The Final Approval of the Name
In 2016, IUPAC approved the name Ununseptium for element 117. The decision was based on the historical significance of the discovery in Russia and the international collaboration in the field of nuclear physics.
The Significance of Element 117
Element 117 is a synthetic element, meaning it cannot be found in nature and is produced in laboratories through nuclear reactions. It is highly radioactive and has a very short half-life, making it impossible to study in its pure form for any significant period. Despite these limitations, element 117 holds significant importance in the field of nuclear physics and the understanding of the periodic table.
Conclusion
The naming of element 117, Ununseptium, is a testament to the collaborative nature of scientific discovery and the importance of tradition in the field of chemistry. The story behind its name is a fascinating glimpse into the world of nuclear physics and the ongoing quest to expand our understanding of the elements that make up our universe.