Àwọn àkójọ nọ́mbà átọ́mù àwọn apilẹ̀sẹ̀

Ọ́ jẹ́ tábìlì àwọn ẹ́límẹ̀ntì tí a tò gẹ́gẹ́ bí atomic number wọn tí a sì fi àwọ̀ se àmì ìyàtò láàrin wọn.  

ZNameSymPeriodGroupChemical seriesMass (g/mol) 1  Hydrogen  H  1  1  Nonmetal   1.00794(7)The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table.The isotopic composition of the element can vary in commercial materials, which can cause the atomic weight to deviate significantly from the given value.The isotopic composition varies in terrestrial material such that a more precise atomic weight can not be given. 2  Helium  He  1  18  Noble gas   4.002602(2) 3  Lithium  Li  2  1  Alkali metal   6.941(2)The atomic weight of commercial lithium can vary between 6.939 and 6.996—analysis of the specific material is necessary to find a more accurate value. 4  Beryllium  Be  2  2  Alkaline earth metal   9.012182(3) 5   Boron  B  2  13  Metalloid   10.811(7) 6   Carbon  C  2  14  Nonmetal   12.0107(8) 7   Nitrogen  N  2  15  Nonmetal   14.0067(2) 8   Oxygen  O  2  16  Nonmetal   15.9994(3) 9   Fluorine  F  2  17  Halogen   18.9984032(5) 10   Neon  Ne  2  18  Noble gas   20.1797(6) 11   Sodium  Na  3  1  Alkali metal   22.98976928(2) 12   Magnesium  Mg  3  2  Alkaline earth metal   24.3050(6) 13   Aluminium  Al  3  13  Poor metal  26.9815386(8) 14   Silicon  Si  3  14  Metalloid   28.0855(3) 15   Phosphorus  P  3  15  Nonmetal   30.973762(2) 16   Sulfur  S  3  16  Nonmetal   32.065(5) 17   Chlorine  Cl  3  17  Halogen   35.453(2) 18   Argon  Ar  3  18  Noble gas   39.948(1) 19   Potassium  K  4  1  Alkali metal   39.0983(1) 20   Calcium  Ca  4  2  Alkaline earth metal   40.078(4) 21   Scandium  Sc  4  3  Transition metal  44.955912(6) 22   Titanium  Ti  4  4  Transition metal  47.867(1) 23   Vanadium  V  4  5  Transition metal  50.9415(1) 24   Chromium  Cr  4  6  Transition metal  51.9961(6) 25   Manganese  Mn  4  7  Transition metal  54.938045(5) 26   Iron  Fe  4  8  Transition metal  55.845(2) 27   Cobalt  Co  4  9  Transition metal  58.933195(5) 28   Nickel  Ni  4  10  Transition metal  58.6934(4) 29   Copper  Cu  4  11  Transition metal  63.546(3) 30   Zinc  Zn  4  12  Transition metal  65.38(2) 31   Gallium  Ga  4  13  Poor metal  69.723(1) 32   Germanium  Ge  4  14  Metalloid   72.64(1) 33   Arsenic  As  4  15  Metalloid   74.92160(2) 34   Selenium  Se  4  16  Nonmetal   78.96(3) 35   Bromine  Br  4  17  Halogen   79.904(1) 36   Krypton  Kr  4  18  Noble gas   83.798(2) 37   Rubidium  Rb  5  1  Alkali metal   85.4678(3) 38   Strontium  Sr  5  2  Alkaline earth metal   87.62(1) 39   Yttrium  Y  5  3  Transition metal  88.90585(2) 40   Zirconium  Zr  5  4  Transition metal  91.224(2) 41   Niobium  Nb  5  5  Transition metal  92.90638(2) 42   Molybdenum  Mo  5  6  Transition metal  95.96(2) 43   Technetium  Tc  5  7  Transition metal  [98.9063]The element does not have any stable nuclides, and a value in brackets, e.g. [209], indicates the mass number of the longest-lived isotope of the element or characteristic isotopic composition. 44   Ruthenium  Ru  5  8  Transition metal  101.07(2) 45   Rhodium  Rh  5  9  Transition metal  102.90550(2) 46   Palladium  Pd  5  10  Transition metal  106.42(1) 47   Silver  Ag  5  11  Transition metal  107.8682(2) 48   Cadmium  Cd  5  12  Transition metal  112.411(8) 49   Indium  In  5  13  Poor metal  114.818(3) 50   Tin  Sn  5  14  Poor metal  118.710(7) 51   Antimony  Sb  5  15  Metalloid   121.760(1) 52   Tellurium  Te  5  16  Metalloid   127.60(3) 53   Iodine  I  5  17  Halogen   126.90447(3) 54   Xenon  Xe  5  18  Noble gas   131.293(6) 55   Caesium  Cs  6  1  Alkali metal   132.9054519(2) 56   Barium  Ba  6  2  Alkaline earth metal   137.327(7) 57   Lanthanum  La  6   Lanthanoid  138.90547(7) 58   Cerium  Ce  6   Lanthanoid  140.116(1) 59   Praseodymium  Pr  6   Lanthanoid  140.90765(2) 60   Neodymium  Nd  6   Lanthanoid  144.242(3) 61   Promethium  Pm  6   Lanthanoid  [146.9151] 62   Samarium  Sm  6   Lanthanoid  150.36(2) 63   Europium  Eu  6   Lanthanoid  151.964(1) 64   Gadolinium  Gd  6   Lanthanoid  157.25(3) 65   Terbium  Tb  6   Lanthanoid  158.92535(2) 66   Dysprosium  Dy  6   Lanthanoid  162.500(1) 67   Holmium  Ho  6   Lanthanoid  164.93032(2) 68   Erbium  Er  6   Lanthanoid  167.259(3) 69   Thulium  Tm  6   Lanthanoid  168.93421(2) 70   Ytterbium  Yb  6   Lanthanoid  173.054(5) 71   Lutetium  Lu  6  3  Lanthanoid  174.9668(1) 72   Hafnium  Hf  6  4  Transition metal  178.49(2) 73   Tantalum  Ta  6  5  Transition metal  180.9479(1) 74   Tungsten  W  6  6  Transition metal  183.84(1) 75   Rhenium  Re  6  7  Transition metal  186.207(1) 76   Osmium  Os  6  8  Transition metal  190.23(3) 77   Iridium  Ir  6  9  Transition metal  192.217(3) 78   Platinum  Pt  6  10  Transition metal  195.084(9) 79   Gold  Au  6  11  Transition metal  196.966569(4) 80   Mercury  Hg  6  12  Transition metal  200.59(2) 81   Thallium  Tl  6  13  Poor metal  204.3833(2) 82   Lead  Pb  6  14  Poor metal  207.2(1) 83   Bismuth  Bi  6  15  Poor metal  208.98040(1) 84   Polonium  Po  6  16  Metalloid   [208.9824] 85   Astatine  At  6  17  Halogen   [209.9871] 86   Radon  Rn  6  18  Noble gas   [222.0176] 87   Francium  Fr  7  1  Alkali metal   [223.0197] 88   Radium  Ra  7  2  Alkaline earth metal   [226.0254] 89   Actinium  Ac  7   Actinoid  [227.0278] 90   Thorium  Th  7   Actinoid  232.03806(2) 91   Protactinium  Pa  7   Actinoid  231.03588(2) 92   Uranium  U  7   Actinoid  238.02891(3) 93   Neptunium  Np  7   Actinoid  [237.0482] 94   Plutonium  Pu  7   Actinoid  [244.0642] 95   Americium  Am  7   Actinoid  [243.0614] 96   Curium  Cm  7   Actinoid  [247.0704] 97   Berkelium  Bk  7   Actinoid  [247.0703] 98   Californium  Cf  7   Actinoid  [251.0796] 99   Einsteinium  Es  7   Actinoid  [252.0829] 100   Fermium  Fm  7   Actinoid  [257.0951] 101   Mendelevium  Md  7   Actinoid  [258.0986] 102   Nobelium  No  7   Actinoid  [259.1009] 103   Lawrencium  Lr  7  3  Actinoid  [264] 104   Rutherfordium  Rf  7  4  Transition metal  [265] 105   Dubnium  Db  7  5  Transition metal  [268] 106   Seaborgium  Sg  7  6  Transition metal  [272] 107   Bohrium  Bh  7  7  Transition metal  [273] 108   Hassium  Hs  7  8  Transition metal  [276] 109   Meitnerium  Mt  7  9  Transition metal  [279] 110   Darmstadtium  Ds  7  10  Transition metal  [278] 111   Roentgenium  Rg  7  11  Transition metal  [283] 112   Copernicium  Cn  7  12  Transition metal  [285] 113   Ununtrium  Uut  7  13  Poor metal  [287] 114   Ununquadium  Uuq  7  14  Poor metal  [289] 115   Ununpentium  Uup  7  15  Poor metal  [291] 116   Ununhexium  Uuh  7  16  Poor metal  [293] 117   Ununseptium  Uus  7  17  Halogen   [295] 118   Ununoctium  Uuo  7  18  Noble gas   [294]

 Notes 

 References 
  (for atomic weights of elements with atomic numbers from 1-102)

  (for atomic weights of elements with atomic numbers 103-118)

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