1
H
Hydrogen 1.00794

2
He
Helium 4.002602

3
Li
Lithium 6.941

4
Be
Beryllium 9.012182

5
B
Boron 10.811

6
C
Carbon 12.0107

7
N
Nitrogen 14.0067

8
O
Oxygen 15.9994

9
F
Fluorine 18.9984032

10
Ne
Neon 20.1797

11
Na
Sodium 22.98976928

12
Mg
Magnesium 24.305

13
Al
Aluminium 26.9815386

14
Si
Silicon 28.0855

15
P
Phosphorus 30.973762

16
S
Sulfur 32.065

17
Cl
Chlorine 35.453

18
Ar
Argon 39.948

19
K
Potassium 39.0983

20
Ca
Calcium 40.078

21
Sc
Scandium 44.955912

22
Ti
Titanium 47.867

23
V
Vanadium 50.9415

24
Cr
Chromium 51.9961

25
Mn
Manganese 54.938045

26
Fe
Iron 55.845

27
Co
Cobalt 58.933195

28
Ni
Nickel 58.6934

29
Cu
Copper 63.546

30
Zn
Zinc 65.38

31
Ga
Gallium 69.723

32
Ge
Germanium 72.63

33
As
Arsenic 74.9216

34
Se
Selenium 78.96

35
Br
Bromine 79.904

36
Kr
Krypton 83.798

37
Rb
Rubidium 85.4678

38
Sr
Strontium 87.62

39
Y
Yttrium 88.90585

40
Zr
Zirconium 91.224

41
Nb
Niobium 92.90638

42
Mo
Molybdenum 95.96

43
Tc
Technetium 98

44
Ru
Ruthenium 101.07

45
Rh
Rhodium 102.9055

46
Pd
Palladium 106.42

47
Ag
Silver 107.8682

48
Cd
Cadmium 112.411

49
In
Indium 114.818

50
Sn
Tin 118.71

51
Sb
Antomony 121.76

52
Te
Tellurium 127.6

53
I
Iodine 126.90447

54
Xe
Xenon 131.293

55
Cs
Caesium 132.9054519

56
Ba
Barium 137.327

*

72
Hf
Hafnium 178.49

73
Ta
Tantalum 180.94788

74
W
Tungsten 183.84

75
Re
Rhenium 186.207

76
Os
Osmium 190.23

77
Ir
Iridium 192.217

78
Pt
Platinum 195.084

79
Au
Gold 196.966569

80
Hg
Mercury 200.59

81
Tl
Thallium 204.3833

82
Pb
Lead 207.2

83
Bi
Bismuth 208.9804

84
Po
Polonium 209

85
At
Astatine 210

86
Rn
Radon 222

87
Fr
Francium 223

88
Ra
Radium 226

**

104
Rf
Rutherfordium 267

105
Db
Dubnium 268

106
Sg
Seaborgium 271

107
Bh
Bohrium 272

108
Hs
Hassium 270

109
Mt
Meitnerium 276

110
Ds
Darmstadtium 281

111
Rg
Roentgenium 280

112
Cn
Copernicium 285

113
Uut
Ununtrium 284

114
Uuq
Ununqudium 289

115
Uup
Ununpentium 288

116
Uuh
Ununhexium 293

117
Uus
Ununseptium 294

118
Uuo
Ununoctium 294

*

57
La
Lanthanum 138.90547

58
Ce
Cerium 140.116

59
Pr
Praseodynium 140.90765

60
Nd
Neodynium 144.242

61
Pm
Promethium 145

62
Sm
Samarium 150.36

63
Eu
Europium 151.964

64
Gd
Gadolinium 157.25

65
Tb
Terbium 158.92535

66
Dy
Dysprosium 162.5

67
Ho
Holmium 164.93032

68
Er
Erbium 167.259

69
Tm
Thulium 168.93421

70
Yb
Ytterbium 173.054

71
Lu
Lutetium 174.9668

**

89
Ac
Actinium 227

90
Th
Thorium 232.03806

91
Pa
Protactinium 231.03588

92
U
Uranium 238.02891

93
Np
Neptunium 237

94
Pu
Plutonium 244

95
Am
Americium 243

96
Cm
Curium 247

97
Bk
Berkelium 247

98
Cf
Californium 251

99
Es
Einsteinium 252

100
Fm
Ferrium 257

101
Md
Mendelevium 258

102
No
Nobelium 259

103
Lr
Lawrencium 262