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 Hydrogène H 1.01

2 Hélium He 4.00

2

3 Lithium Li 6.94

4 Béryllium Be 9.01

5 Bore B 10.81

6 Carbone C 12.01

7 Azote N 14.01

8 Oxygène O 16.00

9 Fluor F 19.00

10 Néon Ne 20.18

3

11 Sodium Na 23.00

12 Magnésium Mg 24.31

13 Aluminium Al 26.98

14 Silicium Si 28.09

15 Phosphore P 30.97

16 Soufre S 32.07

17 Chlore Cl 35.45

18 Argon Ar 39.95

4

19 Potassium K 39.10

20 Calcium Ca 40.08

21 Scandium Sc 44.96

22 Titane Ti 47.89

23 Vanadium V 50.94

24 Chrome Cr 52.00

25 Manganèse Mn 54.94

26 Fer Fe 55.85

27 Cobalt Co 58.93

28 Nickel Ni 58.69

29 Cuivre Cu 63.55

30 Zinc Zn 65.39

31 Gallium Ga 69.72

32 Germanium Ge 72.61

33 Arsenic As 74.92

34 Sélénium Se 78.96

35 Brome Br 79.90

36 Krypton Kr 83.80

5

37 Rubidium Rb 85.48

38 Strontium Sr 87.62

39 Yttrium Y 88.91

40 Zirconium Zr 91.22

41 Niobium Nb 92.91

42 Molybdène Mo 95.94

43 Technétium Tc [99]

44 Ruthénium Ru 101.07

45 Rhodium Rh 102.91

46 Palladium Pd 106.42

47 Argent Ag 107.87

48 Cadmium Cd 112.41

49 Indium In 114.82

50 Etain Sn 118.71

51 Antimoine Sb 121.76

52 Tellure Te 127.60

53 Iode I 126.90

54 Xénon Xe 131.29

6

55 Césium Cs 132.91

56 Baryum Ba 137.33

57-71 Lanthanide *

72 Hafnium Hf 178.49

73 Tantale Ta 180.95

74 Tungstène W 183.84

75 Rhénium Re 186.21

76 Osmium Os 190.23

77 Iridium Ir 192.22

78 Platine Pt 195.08

79 Or Au 196.97

80 Mercure Hg 200.59

81 Thallium Tl 204.38

82 Plomb Pb 207.21

83 Bismuth Bi 208.98

84 Polonium Po [210]

85 Astate At [210]

86 Radon Rn [222]

7

87 Francium Fr [223]

88 Radium Ra [226]

89-103 Actinide **

104 Rutherfordium Rf [261]

105 Dubnium Db [262]

106 Seaborgium Sg [263]

107 Bohrium Bh [262]

108 Hassium Hs [277]

109 Meitnélrium Mt [278]

110 Darmstadtium Ds [281]

111 Roentgenium Rg [281]

112 Copernicium Cn [285]

113 Nihonium Nh [286]

114 Flélrovium Fl [289]

115 Moscovium Mc [289]

116 Livermorium Lv [293]

117 Tennesse Ts [294]

118 Oganesson Og [294]

*

57 Lanthane La 138.91

58 Cérium Ce 140.12

59 Praséodyme Pr 140.91

60 Néodyme Nd 144.24

61 Prométhium Pm [145]

62 Samarium Sm 150.36

63 Europium Eu 151.97

64 Gadolinium Gd 157.25

65 Terbium Tb 158.93

66 Dysprosium Dy 162.50

67 Holmium Ho 164.93

68 Erbium Er 167.26

69 Thulium Tm 168.93

70 Ytterbium Yb 173.04

71 Lutécium Lu 174.97

**

89 Actinium Ac [227]

90 Thorium Th 232.04

91 Protactinium Pa 231.04

92 Uranium U 238.03

93 Neptunium Np [237]

94 Plutonium Pu [239]

95 Américium Am [243]

96 Curium Cm [247]

97 Berkélium Bk [247]

98 Californium Cf [252]

99 Einsteinium Es [252]

100 Fermium Fm [257]

101 Mendélévium Md [256]

102 Nobélium No [259]

103 Lawrencium Lr [260]