Four new elements included in the periodic table – RSUTE

Periodic Table supplemented by four new elements. According to the decision of the International Union of Pure and Applied Chemistry were added ununtrium (Uut) under number 113, Ununpentium (Uup) under number 115, Ununseptium (Uus) under the number 117 and ununoctium (Uuo) under the number 118.

The new elements to refill the table, artificially synthesized: in nature there are chemical elements to the number of protons in the nucleus (atomic number) is not greater than 92 (uranium). Elements having the proton amount in the range of from 93 to 100 can be prepared in a reactor, and the rest – for particle accelerators. The full version includes 126 table of elements, including elements 121-126, which have not yet been synthesized.

The opening of the 115th, 117th and 118th members made a group of Russian and American scientists from the Joint Institute Nuclear Research in Dubna, the Lawrence Livermore National Laboratory in California and the Oak Ridge National Laboratory in Tennessee. Their working title – Ununpentium (Uup), Ununseptium (Uus) and ununoctium (Uuo). 113th element (ununtrium, Uut) was synthesized by experts from the Japanese Institute of Natural Sciences (RIKEN). The choice of a permanent name discoverers elements is given five months, then the name must be approved by the Board of IUPAC.

The right to name the elements with atomic numbers 115, 117 and 118 belong to the Russian-American team of scientists from the Joint Institute for Nuclear Research in Dubna, Lawrence Livermore National Laboratory in California and the Oak Ridge National Laboratory in Tennessee. New elements are assigned “provisional” name Ununpentium (ununpentium – Uup), Ununseptium (ununseptium – Uus) and ununoctium (ununoctium – Uuo), and after five months in the periodic table will their real names and two-letter designations.

The latest addition to the periodic table was made in 2011, when they were discovered elements 114-m and 116-m atomic numbers called Flerov and Livermore.

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