Four New Elements Added To 7th Row Of Periodic Table

Discovery of four new elements which atomic numbers are 113, 115, 117 and 118, marks the complete of Periodic Table's Seventh Row. Ununtrium (Uut), Ununpentium (Uup), Ununseptium (Uus), and Ununoctium (Uuo) respectively are the temporary names given to the elements.

With the discovery of the four new elements, the seventh row of the periodic table is now complete. According to the announcement made by the International Union of Pure and Applied Chemistry (IUPAC), the elements which atomic numbers are 113, 115, 117 and 118 will have the temporary working names – Ununtrium (Uut), Ununpentium (Uup), Ununseptium (Uus), and Ununoctium (Uuo) respectively.

 Periodic Table Before With Four New Elements

As per the Verge, these four new elements are the first to be added to the table since 2011, and they will be given permanent names over the next few months.

Elements 115, 117, and 118 were jointly discovered by scientists from the Joint Institute for Nuclear Research in Dubna, Russia and Lawrence Livermore National Laboratory in California. The credit for the discovery of element 113 (ununtrium) has been awarded to scientists at the RIKEN Institute in Wako, Japan.

Despite the Russian-American team claimed the discovery, the IUPAC declared the element 113 as the first on the periodic table to be discovered and named by Asian scientists.

As the IUPAC has the discoveries approved on December 30, the researchers have the right to name the elements they discovered. Report suggests the Japanese team will name element 113 as “Japanium.”

“The chemistry community is eager to see its most cherished table finally being completed down to the seventh row. IUPAC has now initiated the process of formalizing names and symbols for these elements temporarily named as ununtrium, (Uut or element 113), ununpentium (Uup, element 115), ununseptium (Uus, element 117), and ununoctium (Uuo, element 118),” said Professor Jan Reedijk, President of the Inorganic Chemistry Division of IUPAC, in a statement at IUPAC.

The four new elements, all of which are man-made, were discovered by smashing together lighter ­nuclei into each other and tracking the following decay of the radioactive superheavy elements. These elements exist only for a fraction of second before they decompose into other forms of elements. Report says discovering these elements has proven difficult because of their rapid decaying nature.

Kosuke Morita, who led the research on element 113 at Riken, said his team now plans to “look to the uncharted territory of element 119 and beyond.”

Image via Sciencenotes


  1. Oops, the link to my table post (it is in Spanish) and something more on it and its use.
    For the last link there is a (II) post you’ll find interesting (I do not include more links here, but I wrote more on this topic, sometimes seriously and other times in a more entertaining way, search yourselves).
    Best regards.

  2. Hi there,
    Mendeleiev predicted the existence of Germanium, despite the name for Mendelevium, which is a trasactinide whose atomic number is 101.
    Had it been named according the systematic quantum physics-chemistry naming rule, its name would have been Unilunum, but they gave it the name Mendelevium to honor Mendeleiev.
    The completion for the seventh period for the IUPAC’s periodic table this way, takes many transactinides, which belong to Rare Earths elements along with those between Lantanum and Hafnium.
    It is not a wise thing to order those elements (nor to think the are man-made, which is not true because they are only man-discovered), because their physycal and also chemical properties differ very much all along the
    n = 7 principle quantum number, the one for periods, giving an idea of how far the external shell is from the nucleus, and also with their same either group-mates: anfoterism, allotropy, magnetic responsiveness, magnetic ordering and behaviour, emission and absorption spectra, atomic average radius, among other properties differ too much.
    I think you should take a look at my table (copyrighted by me) and some posts about how my table works, which you can find searching in my blog’s search bar tool (if you see it in computer desktop mode it will appear on top right margin under the header) ‘chemistry’, ‘physics’, ‘tabla’, ‘table’…
    By the way, if you look at my table you can see directly the sequence for decay from Uranium, U, to Lead, Pb (right to left).
    For any questions or comments, email me or comment in my blog.
    Happy New Year!

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