IUPAC announced addition of Four Elements to complete Seventh
row of Periodic Table
The International
Union of Pure and Applied Chemistry (IUPAC) announced discovery and assignment
of elements with atomic numbers 113, 115, 117 and 118. The decision was taken
by the IUPAC as the four elements met the discovery of elements of the
IUPAP/IUPAC Transfermium Working Group (TWG) 1991 Discovery Criteria.
All these four
elements are synthetic in nature. They were discovered by scientists belonging
to the USA, Russian and Japan and complete the 7th row of the periodic table of
the elements. Also, these four elements are the first to be added to the table
since 2011, when elements 114 (Flerovium, FI) and 116 (Livermorium, LV) were
added.
Naming of elements:
After officially recognizing the elements, the IUPAC also invited suggestions
related to permanent names and symbols from the scientists who discovered them.
New elements can be named after a mythological concept, a mineral, a place or
country, a property or a scientist.
Details of four elements
|
Element
Number
|
Temporary
Name
|
Temporary
Symbol
|
Others
|
|
113
|
Ununtrium
|
Uut
|
Discovered by the scientists
belonging to RIKEN research laboratory in Japan
|
|
115
|
Ununpentium
|
Uup
|
Discovered by scientists belonging
to Russia and the USA in collaboration. In element 117, Indian scientist
Susanta Lahiri played an important role
|
|
117
|
Unnseptium
|
Uus
|
|
|
118
|
Ununoctium
|
Uuo
|
Jointly discovered by scientists
belonging to the Nuclear Research in Dubna, Russia and Lawrence Livermore
National Laboratory, California, USA
|
How they were discovered?
They were
discovered by slamming lighter nuclei into each other and tracking the
following decay of the radioactive superheavy elements. Like other superheavy
elements that populate the end of the periodic table, they only exist for fractions
of a second before decaying into other elements.
About IUPAC
Ø It
is an association of bodies, National Adhering Organizations, which represent
the chemists of different member countries.
Ø It
was formed in 1919 by chemists from industry and academia and headquartered in
Zurich, Switzerland.
Ø It
serves to advance the worldwide aspects of the chemical sciences and to
contribute to the application of chemistry in the service of mankind.
Ø Over
nearly eight decades, it has succeeded in fostering worldwide communications in
the chemical sciences and in uniting academic, industrial and public sector
chemistry in a common language.
=========================================
nice
ReplyDeleteThanks...
Delete