Chemistry ’ s highest gatekeeper , IUPAC has finally given names to the recently discovered elements with mass numbers 113 , 115 , 117 , 118 . Please welcome Nihonium , Moscovium , Tennessine and Oganesson to both periodic table and syllabus .
New elements were synthesized between 2002 and 2010 , but it wasn ’ t until December of 2015 that IUPAC officially recognized the discoveries . Then in June 2016 , the scientists who discovered them sent IUPAC their suggested names for their discoveries . Element with mass number 113 got named Nihonium ( Nh ) after Japanese word Nihon , meaning Japan . The next discovered element with mass number 115 got named Moscow ( Mc ), and element 117 , symbol Ts , after Tennessee . The last discovery of element with mass number 118 was named Oganesson ( OG ), after Yuri Oganessian , a prolific element hunter by Russian researchers . With this , we bid farewell to the periodic table ’ s seventh row placeholders . Good bye ununtrium . Adios ununpentium . Sayonara ununseptium . Arrivederci ununoctium .