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IUPAC Provisional Recommendations

1 IUPAC of the Elements 18 1 2 H He hydrogen helium [1.007, 1.009] 2 Key: 13 14 15 16 17 4.003 of superheavy elements and signifi cant advances in 3 4 atomic number 5 6 7 8 9 10 Li Be Symbol B C N O F Ne

lithium beryllium name boron carbon nitrogen oxygen fluorine neon [6.938, 6.997] 9.012 standard atomic weight [10.80, 10.83] [12.00, 12.02] [14.00, 14.01] [15.99, 16.00] 19.00 20.18

11 12 13 14 15 16 17 18 the of superheavy nuclei, including ex- Na Mg Al Si P S Cl Ar sodium magnesium aluminium silicon phosphorus sulfur chlorine argon 22.99 [24.30, 24.31] 3 4 5 6 7 8 9 10 11 12 26.98 [28.08, 28.09] 30.97 [32.05, 32.08] [35.44, 35.46] 39.95 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton 39.10 40.08 44.96 47.87 50.94 52.00 54.94 55.85 58.93 58.69 63.55 65.38(2) 69.72 72.63 74.92 78.97 [79.90, 79.91] 83.80 perimental evidence for the “”. 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon 85.47 87.62 88.91 91.22 92.91 95.95 101.1 102.9 106.4 107.9 112.4 114.8 118.7 121.8 127.6 126.9 131.3 55 56 57-71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

Cs Ba lanthanoids Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon 132.9 137.3 178.5 180.9 183.8 186.2 190.2 192.2 195.1 197.0 200.6 [204.3, 204.4] 207.2 209.0 87 88 89-103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

Fr Ra actinoids Rf Db Sg Bh Hs Mt Ds Rg Cn Uut Fl Uup Lv Uus Uuo francium radium ununtrium ununpentium ununseptium ununoctium References:

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium 138.9 140.1 140.9 144.2 150.4 152.0 157.3 158.9 162.5 164.9 167.3 168.9 173.0 175.0 1. P.J. Karol, R.C. Barber, B.M. Sherrill, E. Vardaci, T. 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr actinium thorium protactinium uranium neptunium plutonium americium berkelium californium 232.0 231.0 238.0 Yamazaki, (2016) Pure Appl. Chem. :139; http:// For notes and updates to this table, see www.iupac.org. This version is dated 8 January 2016. 88 Copyright © 2016 IUPAC, the International Union of Pure and Applied Chemistry. dx.doi.org/10.1515/pac-2015-0502 113 115 117 118 Nh Mc Ts Og 2. P.J. Karol, R. C. Barber, B. M. Sherrill, E. Vardaci, T. Yamazaki, (2016) Pure Appl. Chem. 88:155; http:// at RIKEN Nishina Center for Accelerator-Based Science dx.doi.org/10.1515/pac-2015-0501 (Japan) proposed the name and the sym- 3. W.H. Koppenol, J. Corish, J. Garcia-Martinez, J. bol Nh. Nihon is one of the two ways to say “Japan” in Meija, J. Reedijk, (2016) Pure Appl. Chem. 88:401; Japanese, and literally means “the Land of Rising Sun”. http://dx.doi.org/10.1515/pac-2015-0802 The name is proposed to make a direct connection to the nation where the element was discovered. Element Comments by 8 November 2016 113 is the fi rst element to have been discovered in an Asian country. Corresponding Author: Jan Reedijk, [email protected] For the element with atomic number 115, the name www.iupac.org/recommendation/names-and-symbols-of-the-elements- proposed is with the symbol Mc and for with-atomic-numbers-113-115-117-and-118/ element with atomic number 117, the name proposed is with the symbol Ts. These are in line with tradition, honoring a place or geographical region, and Preferred Names of Constitutional are proposed jointly by the discoverers at the Joint Units for Use in Structure-based Institute for Nuclear Research, Dubna (Russia), Oak Names of Polymers Ridge National Laboratory (USA), Vanderbilt Univer- sity (USA), and Lawrence Livermore National Labora- A list of constitutional units (CU) used for naming tory (USA). polymers according to IUPAC nomenclature rules is Moscovium is in recognition of the Moscow region provided. This list contains CUs of commercial and and honors the ancient Russian land that is the home well-known polymers, as well as CUs which have been of the Joint Institute for Nuclear Research, where the used in polymer-nomenclature-related IUPAC docu- discovery experiments were conducted using the Dub- ments. A preferred name is provided for each consti- na Gas-Filled Recoil Separator in combination with the tutional unit. Other acceptable names are also listed, heavy ion accelerator capabilities of the Flerov Labo- along with names which must not be used because ratory of Nuclear Reactions. they are outdated or incorrect, although they may Tennessine is in recognition of the contribution of have been correct in the past or in a diff erent con- the Tennessee region, including Oak Ridge National text. A second table contains the names of common Laboratory, Vanderbilt University, and the University polymers: structure-based, source-based, and retained of Tennessee at Knoxville, to re- traditional polymer names, as well as names that are search, including the production and chemical separa- not acceptable, again because they are outdated or tion of unique actinide target materials for superheavy incorrect. These tables supersede similar tables and element synthesis at ORNL’s High Flux Isotope Reactor names in previous documents. The rules given in those and Radiochemical Engineering Development Center. documents are still valid, but the names of constitu- For the element with atomic number 118, the col- tional units should be checked for agreement with the laborating teams of discoverers at the Joint Institute present document. The preferred names of constitu- for Nuclear Research, Dubna (Russia) and Lawrence tional units in Table 1 should be used in structure-based Livermore National Laboratory (USA) proposed the names of regular and irregular polymers. name and symbol Og. The proposal is in line with the tradition of honoring a scientist and rec- Comments by 14 November 2016 ognizes Professor Yuri Oganessian (born 1933) for his pioneering contributions to transactinoid elements re- Corresponding Author: Werner Mormann, [email protected] search. His many achievements include the discovery www.iupac.org/project/2008-015-1-400

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