IA

VIIIA

1 H 1.01

IIA

Número Atômico Símbolo Massa Atômica

Metais   Metais de Transição   Semimetais   Não-metais

IIIA

IVA

VA

VIA

VIIA

2 He 4.00

3 Li 6.94

4 Be 9.01

5 B 10.81

6 C 12.01

7 N 14.01

8 O 16.00

9 F 19.00

10 Ne 20.18

11 Na 22.99

12 Mg 24.31

IIIB

IVB

VB

VIB

VIIB

VIIIB

IB

IIB

13 Al 26.98

14 Si 28.09

15 P 30.97

16 S 32.06

17 Cl 35.45

18 Ar 39.95

19 K 39.10

20 Ca 40.08

21 Sc 44.96

22 Ti 47.90

23 V 50.94

24 Cr 52.00

25 Mn 54.94

26 Fe 55.85

27 Co 58.93

28 Ni 58.71

29 Cu 63.55

30 Zn 65.38

31 Ga 69.72

32 Ge 72.59

33 As 74.92

34 Se 78.96

35 Br 79.90

36 Kr 83.80

37 Rb 85.47

38 Sr 87.62

39 Y 88.91

40 Zr 91.22

41 Nb 92.91

42 Mo 95.94

43 Tc (98)

44 Ru 101.07

45 Rh 102.91

46 Pd 106.4

47 Ag 107.87

48 Cd 112.40

49 In 114.82

50 Sn 118.69

51 Sb 121.75

52 Te 127.60

53 I 126.90

54 Xe 131.30

55 Cs 132.91

56 Ba 137.34

57-71*

72 Hf 178.49

73 Ta 180.95

74 W 183.85

75 Re 186.21

76 Os 190.2

77 Ir 192.22

78 Pt 195.09

79 Au 196.97

80 Hg 200.59

81 Tl 204.37

82 Pb 207.2

83 Bi 208.96

84 Po (209)

85 At (210)

86 Rn (222)

87 Fr (223)

88 Ra 226.03

89-103*

104 Rf (261)

105 Db (262)

106 Sg (263)

107 Bh (262)

108 Hs (265)

109 Mt (266)

110 Uun (269)

111 Uuu (272)

112 Uub  (277)

113 Uut  (282)

*Lanthanide series:

57 La 138.91

58 Ce 140.11

59 Pr 140.91

60 Nd 144.24

61 Pm (145)

62 Sm 150.36

63 Eu 151.96

64 Gd 157.25

65 Tb 158.92

66 Dy 162.50

67 Ho 164.93

68 Er 167.26

69 Tm 168.93

70 Yb 173.04

71 Lu 174.97

*Actinide series:

89 Ac 227

90 Th 232.04

91 Pa 231.04

92 U 238.03

93 Np 237.05

94 Pu (244)

95 Am (243)

96 Cm (247)

97 Bk (247)

98 Cf (251)

99 Es (252)

100 Fm (257)

101 Md (258)

102 No (259)

103 Lr (260)