انجمن بین المللی شیمی محض و کاربردی (آیوپاک IUPAC )کشف عناصر با عدد اتمی های 113، 115 ، 117 و 118 را تایید کرد. بنابر این تناوب هفتم جدول تناوبی که تنها تناوب ناقص این جدول بود تکمیل گردید. اصل خبر از سایت آیوپاک به صورت زیر می باشد.

Discovery and Assignment of Elements withِ Atomic Numbers 113, 115, 117 and 118

IUPAC aounces the verification of the discoveries of four new chemical elements: The 7th period of the periodic table of elements is complete.

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Update 21 Jan 2016: Technical Reports available

The fourth IUPAC/IUPAP Joint Working Party (JWP) on the priority of claims to the discovery of new elements has reviewed the relevant literature for elements 113, 115, 117, and 118 and has determined that the claims for discovery of these elements have been fulfilled, in accordance with the criteria for the discovery of elements of the IUPAP/IUPAC Transfermium Working Group (TWG) 1991 discovery criteria. These elements complete the 7th row of the periodic table of the elements, and the discoverers from Japan, Russia and the USA will now be invited to suggest permanent names and symbols. The new elements and assigned priorities of discovery are as follows: