A Periodic table which is considered to be the list of all elements with their atomic numbers and atomic weights has a reason to be jubilant. The 7th row of the table is complete. It was incomplete till recently, although the existence of the elements to fill the vacant places were predicted much before. The elements, which have been added to the designated positions in the 7th row of the table, are yet to get their formal names. But those are merely process and we will soon have a periodic table, a complete one, with the formal names of the new discoveries.
At present, the new elements are occupying gracefully 113th, 115th, 117th and 118th positions amongst their counterparts. The positions, that is 113, 115, 117 and 118 are naturally the atomic numbers of the elements, that is the number of protons present in nuclei of the elements or the number of electrons that are circling round the nuclei of the atoms of the elements. Presently these new super-heavy and very unstable elements are known as ununtrium (Uut, atomic number 113), ununpentium (Uup, atomic number 115), ununpentium (Uus, atomic number 117) and ununoctium (Uuo, atomic number 118). The elements being heavier than Uranium 92 (which is the heaviest element to exist naturally) are extremely unstable and cannot exist naturally.
IUPAC (The International Union of Pure and Applied Chemistry) is the Global body which, undertakes the governance of the nomenclatures as well as measurement in Chemistry, has recognised the scientists of the RIKEN Institute of Wako, Japan, as the discoverer of the element Uut, 113. Whereas, IUPAC has awarded the credit of discovering the element Uut (118) to the teams from US and Russia, working in joint collaboration and belonging to the Joint Institute for Nuclear research in Dubna and Lawrence Livermore National Laboratory California in the US. The same team has been credited with the discovery of the other two elements with atomic numbers 115 and 117 but with collaboration of another institute Oak Ridge National Laboratory in Oak Ridge, Tennessee.
Being very new to the periodic table family, the new elements are yet to be observed to reveal their entire chemical properties. However the following are the properties which have been identified till date:
Atomic Number: 113
Group Number: 13
Electronic Configuration: [Rn]5f146d107s27p1
Atomic Number: 115
Group Number: 15
Electronic Configuration: [Rn] 5f146d107s27p3
Atomic Number: 117
Group Number: 17
Electronic Configuration: [Rn]5f146d107s27p5
Atomic Number: 118
Group Number: 18
Electronic Configuration: [Rn]5f146d107s27p6