IA

IIA

IIIA

IVA

VA

VIA

VIIA

VIII

IB

IIB

IIIB

IVB

VB

VIB

VIIB

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

1

1 Idrogeno H 1.01

2 Elio He 4.00

2

3 Litio Li 6.94

4 Berillio Be 9.01

5 Boro B 10.81

6 Carbonio C 12.01

7 Azoto N 14.01

8 Ossigeno O 16.00

9 Fluoro F 19.00

10 Neon Ne 20.18

3

11 Sodio Na 23.00

12 Magnesio Mg 24.31

13 Alluminio Al 26.98

14 Silicio Si 28.09

15 Fosforo P 30.97

16 Zolfo S 32.07

17 Cloro Cl 35.45

18 Argon Ar 39.95

4

19 Potassio K 39.10

20 Calcio Ca 40.08

21 Scandio Sc 44.96

22 Titanio Ti 47.89

23 Vanadio V 50.94

24 Cromo Cr 52.00

25 Manganese Mn 54.94

26 Ferro Fe 55.85

27 Cobalto Co 58.93

28 Nichel Ni 58.69

29 Rame Cu 63.55

30 Zinco Zn 65.39

31 Gallio Ga 69.72

32 Germanio Ge 72.61

33 Arsenico As 74.92

34 Selenio Se 78.96

35 Bromo Br 79.90

36 Kripton Kr 83.80

5

37 Rubidio Rb 85.48

38 Stronzio Sr 87.62

39 Ittrio Y 88.91

40 Zirconio Zr 91.22

41 Niobio Nb 92.91

42 Molibdeno Mo 95.94

43 Tecnezio Tc [99]

44 Rutenio Ru 101.07

45 Rodio Rh 102.91

46 Palladio Pd 106.42

47 Argento Ag 107.87

48 Cadmio Cd 112.41

49 Indio In 114.82

50 Stagno Sn 118.71

51 Antimonio Sb 121.76

52 Tellurio Te 127.60

53 Iodio I 126.90

54 Xeno Xe 131.29

6

55 Cesio Cs 132.91

56 Bario Ba 137.33

57-71 Lantanoidi *

72 Afnio Hf 178.49

73 Tantalio Ta 180.95

74 Tungsteno W 183.84

75 Renio Re 186.21

76 Osmio Os 190.23

77 Iridio Ir 192.22

78 Platino Pt 195.08

79 Oro Au 196.97

80 Mercurio Hg 200.59

81 Tallio Tl 204.38

82 Piombo Pb 207.21

83 Bismuto Bi 208.98

84 Polonio Po [210]

85 Astato At [210]

86 Radon Rn [222]

7

87 Francio Fr [223]

88 Radio Ra [226]

89-103 Attinoidi **

104 Rutherfordio Rf [261]

105 Dubnio Db [262]

106 Seaborgio Sg [263]

107 Bohrio Bh [262]

108 Hassio Hs [277]

109 Meitnerio Mt [278]

110 Darmstadtio Ds [281]

111 Roentgenio Rg [281]

112 Copernicio Cn [285]

113 Nihonio Nh [286]

114 Flerovio Fl [289]

115 Moscovio Mc [289]

116 Livermorio Lv [293]

117 Tennessinio Ts [294]

118 Oganessio Og [294]

*

57 Lantanio La 138.91

58 Cerio Ce 140.12

59 Praseodimio Pr 140.91

60 Neodimio Nd 144.24

61 Promezio Pm [145]

62 Samario Sm 150.36

63 Europio Eu 151.97

64 Gadolinio Gd 157.25

65 Terbio Tb 158.93

66 Disprosio Dy 162.50

67 Olmio Ho 164.93

68 Erbio Er 167.26

69 Tulio Tm 168.93

70 Itterbio Yb 173.04

71 Lutezio Lu 174.97

**

89 Attinio Ac [227]

90 Torio Th 232.04

91 Protoattinio Pa 231.04

92 Uranio U 238.03

93 Nettunio Np [237]

94 Plutonio Pu [239]

95 Americio Am [243]

96 Curio Cm [247]

97 Berkelio Bk [247]

98 Californio Cf [252]

99 Einsteinio Es [252]

100 Fermio Fm [257]

101 Mendelevio Md [256]

102 Nobelio No [259]

103 Laurenzio Lr [260]