| 1 | H |  idrogeno | ma= 1,008 u | χ= 2,20  | 
  
  
    | 2 | He |  elio | ma= 4,003 u | χ= -  | 
  
  
    | 3 | Li |  litio | ma= 6,941 u | χ= 0,98  | 
  
  
    | 4 | Be |  berillio | ma= 9,012 u | χ= 1,57  | 
  
  
    | 5 | B |  boro | ma= 10,81 u | χ= 2,04  | 
  
  
    | 6 | C |  carbonio | ma= 12,01 u | χ= 2,55  | 
  
  
    | 7 | N |  azoto | ma= 14,01 u | χ= 3,04  | 
  
  
    | 8 | O |  ossigeno | ma= 16,00 u | χ= 3,44  | 
  
  
    | 9 | F |  fluoro | ma= 19,00 u | χ= 3,98  | 
  
  
    | 10 | Ne |  neon | ma= 20,18 u | χ= -  | 
  
  
    | 11 | Na |  sodio | ma= 22,99 u | χ= 0,93  | 
  
  
    | 12 | Mg |  magnesio | ma= 24,31 u | χ= 1,31  | 
  
  
    | 13 | Al |  alluminio | ma= 26,98 u | χ= 1,61  | 
  
  
    | 14 | Si |  silicio | ma= 28,09 u | χ= 1,90  | 
  
  
    | 15 | P |  fosforo | ma= 30,97 u | χ= 2,19  | 
  
  
    | 16 | S |  zolfo | ma= 32,07 u | χ= 2,58  | 
  
  
    | 17 | Cl |  cloro | ma= 35,45 u | χ= 3,16  | 
  
  
    | 18 | Ar |  argon | ma= 39,95 u | χ= -  | 
  
  
    | 19 | K |  potassio | ma= 39,10 u | χ= 0,82  | 
  
  
    | 20 | Ca |  calcio | ma= 40,08 u | χ= 1,00  | 
  
  
    | 21 | Sc |  scandio | ma= 44,96 u | χ= 1,36  | 
  
  
    | 22 | Ti |  titanio | ma= 47,87 u | χ= 1,54  | 
  
  
    | 23 | V |  vanadio | ma= 50,94 u | χ= 1,63  | 
  
  
    | 24 | Cr |  cromo | ma= 52,00 u | χ= 1,66  | 
  
  
    | 25 | Mn |  manganese | ma= 54,94 u | χ= 1,55  | 
  
  
    | 26 | Fe |  ferro | ma= 55,85 u | χ= 1,83  | 
  
  
    | 27 | Co |  cobalto | ma= 58,93 u | χ= 1,88  | 
  
  
    | 28 | Ni |  nichel | ma= 58,96 u | χ= 1,91  | 
  
  
    | 29 | Cu |  rame | ma= 63,55 u | χ= 1,90  | 
  
  
    | 30 | Zn |  zinco | ma= 65,38 u | χ= 1,65  | 
  
  
    | 31 | Ga |  gallio | ma= 69,72 u | χ= 1,81  | 
  
  
    | 32 | Ge |  germanio | ma= 72,63 u | χ= 2,01  | 
  
  
    | 33 | As |  arsenico | ma= 74,92 u | χ= 2,18  | 
  
  
    | 34 | Se |  selenio | ma= 78,96 u | χ= 2,55  | 
  
  
    | 35 | Br |  bromo | ma= 79,90 u | χ= 2,96  | 
  
  
    | 36 | Kr |  cripton | ma= 83,80 u | χ= 3,00  | 
  
  
    | 37 | Rb |  rubidio | ma= 85,47 u | χ= 0,82  | 
  
  
    | 38 | Sr |  stronzio | ma= 87,62 u | χ= 0,95  | 
  
  
    | 39 | Y |  ittrio | ma= 88,91 u | χ= 1,22  | 
  
  
    | 40 | Zr |  zirconio | ma= 91,22 u | χ= 1,33  | 
  
  
    | 41 | Nb |  niobio | ma= 92,91 u | χ= 1,60  | 
  
  
    | 42 | Mo |  molibdeno | ma= 95,95 u | χ= 2,16  | 
  
  
    | 43 | Tc |  teczenio | ma= 98,91 u | χ= 1,90  | 
  
  
    | 44 | Ru |  rutenio | ma= 101,10 u | χ= 2,20  | 
  
  
    | 45 | Rh |  rodio | ma= 102,90 u | χ= 2,28  | 
  
  
    | 46 | Pd |  palladio | ma= 106,40 u | χ= 2,20  | 
  
  
    | 47 | Ag |  argento | ma= 107,90 u | χ= 1,93  | 
  
  
    | 48 | Cd |  cadmio | ma= 112,40 u | χ= 1,69  | 
  
  
    | 49 | In |  indio | ma= 114,80 u | χ= 1,78  | 
  
  
    | 50 | Sn |  stagno | ma= 118,70 u | χ= 1,96  | 
  
  
    | 51 | Sb |  antimonio | ma= 121,80 u | χ= 2,05  | 
  
  
    | 52 | Te |  tellurio | ma= 127,60 u | χ= 2,10  | 
  
  
    | 53 | I |  iodio | ma= 126,90 u | χ= 2,66  | 
  
  
    | 54 | Xe |  xenon | ma= 131,30 u | χ= 2,60  | 
  
  
    | 55 | Cs |  cesio | ma= 132,90 u | χ= 0,79  | 
  
  
    | 56 | Ba |  bario | ma= 137,30 u | χ= 0,89  | 
  
  
    | 57 | La |  lantanio | ma= 138,90 u | χ= 1,10  | 
  
  
    | 58 | Ce |  cerio | ma= 140,10 u | χ= 1,12  | 
  
  
    | 59 | Pr |  praseodimio | ma= 140,90 u | χ= 1,13  | 
  
  
    | 60 | Nd |  neodimio | ma= 144,20 u | χ= 1,14  | 
  
  
    | 61 | Pm |  promezio | ma= 145,00 u | χ= -  | 
  
  
    | 62 | Sm |  samario | ma= 150,40 u | χ= 1,17  | 
  
  
    | 63 | Eu |  europio | ma= 152,00 u | χ= -  | 
  
  
    | 64 | Gd |  gadolinio | ma= 157,30 u | χ= 1,20  | 
  
  
    | 65 | Tb |  terbio | ma= 158,90 u | χ= 1,20  | 
  
  
    | 66 | Dy |  disprosio | ma= 162,50 u | χ= 1,22  | 
  
  
    | 67 | Ho |  olmio | ma= 164,90 u | χ= 1,23  | 
  
  
    | 68 | Er |  erbio | ma= 167,30 u | χ= 1,24  | 
  
  
    | 69 | Tm |  tulio | ma= 168,90 u | χ= 1,25  | 
  
  
    | 70 | Yb |  itterbio | ma= 173,00 u | χ= 1,10  | 
  
  
    | 71 | Lu |  lutezio | ma= 175,00 u | χ= 1,27  | 
  
  
    | 72 | Hf |  afnio | ma= 178,50 u | χ= 1,30  | 
  
  
    | 73 | Ta |  tantalio | ma= 180,90 u | χ= 1,50  | 
  
  
    | 74 | W |  tungsteno | ma= 138,80 u | χ= 2,36  | 
  
  
    | 75 | Re |  renio | ma= 186,20 u | χ= 1,90  | 
  
  
    | 76 | Os |  osmio | ma= 190,20 u | χ= 2,20  | 
  
  
    | 77 | Ir |  iridio | ma= 192,20 u | χ= 2,20  | 
  
  
    | 78 | Pt |  platino | ma= 195,10 u | χ= 2,28  | 
  
  
    | 79 | Au |  oro | ma= 197,00 u | χ= 2,54  | 
  
  
    | 80 | Hg |  mercurio | ma= 200,60 u | χ= 1,90  | 
  
  
    | 81 | Tl |  tallio | ma= 204,40 u | χ= 2,04  | 
  
  
    | 82 | Pb |  piombo | ma= 207,20 u | χ= 2,33  | 
  
  
    | 83 | Bi |  bismuto | ma= 209,00 u | χ= 2,02  | 
  
  
    | 84 | Po |  polonio | ma= 209,00 u | χ= 2,00  | 
  
  
    | 85 | At |  astato | ma= 210,00 u | χ= 2,20  | 
  
  
    | 86 | Rn |  radon | ma= 222,00 u | χ= -  | 
  
  
    | 87 | Fr |  francio | ma= 223,00 u | χ= 0,70  | 
  
  
    | 88 | Ra |  radio | ma= 226,00 u | χ= 0,90  | 
  
  
    | 89 | Ac |  attinio | ma= 227,00 u | χ= 1,10  | 
  
  
    | 90 | Th |  torio | ma= 232,00 u | χ= 1,30  | 
  
  
    | 91 | Pa |  protoattinio | ma= 231,00 u | χ= 1,50  | 
  
  
    | 92 | U |  uranio | ma= 238,00 u | χ= 1,38  | 
  
  
    | 93 | Np |  nettunio | ma= 237,00 u | χ= 1,36  | 
  
  
    | 94 | Pu |  plutonio | ma= 2,44 u | χ= 1,28  | 
  
  
    | 95 | Am |  americio | ma= 243,00 u | χ= 1,30  | 
  
  
    | 96 | Cm |  curio | ma= 247,00 u | χ= 1,30  | 
  
  
    | 97 | Bk |  berkelio | ma= 247,00 u | χ= 1,30  | 
  
  
    | 98 | Cf |  californio | ma= 251,00 u | χ= 1,30  | 
  
  
    | 99 | Es |  einsteinio | ma= 252,00 u | χ= 1,30  | 
  
  
    | 100 | Fm |  fermio | ma= 257,00 u | χ= 1,30  | 
  
  
    | 101 | Md |  mendelevio | ma= 258,00 u | χ= 1,30  | 
  
  
    | 102 | No |  nobelio | ma= 259,00 u | χ= 1,30  | 
  
  
    | 103 | Lr |  laurenzio | ma= 262,00 u | χ= 1,30  | 
  
  
    | 104 | Rf |  rutherfordio | ma= 261,00 u | χ= -  | 
  
  
    | 105 | Db |  dubnio | ma= 262,00 u | χ= -  | 
  
  
    | 106 | Sg |  seaborgio | ma= 266,00 u | χ= -  | 
  
  
    | 107 | Bh |  bohrio | ma= 264,00 u | χ= -  | 
  
  
    | 108 | Hs |  hassio | ma= 265,00 u | χ= -  | 
  
  
    | 109 | Mt |  meitnerio | ma= 268,00 u | χ= -  | 
  
  
    | 110 | Ds |  darmstadio | ma= 271,00 u | χ= -  | 
  
  
    | 111 | Rg |  roentgenio | ma= 272,00 u | χ= -  | 
  
  
    | 112 | Cn |  copernicio | ma= 285,00 u | χ= -  |