1H 1.008 Hydrogen

2He 4.004 Helium

3Li 6.941 Lithium

4Be 9.012 Beryllium

5B 10.811 Boron

6C 12.011 Carbon

7N 14.007 Nitrogen

8O 15.999 Oxygen

9F 18.998 Fluorine

10Ne 20.179 Neon

11Na 22.99 Sodium

12Mg 24.305 Magnesium

13Al 26.982 Aluminium

14Si 28.086 Silicon

15P 30.974 Phosphorus

16S 32.06 Sulphur

17Cl 35.453 Chlorine

18Ar 39.948 Argon

19K 39.098 Potassium

20Ca 40.08 Calcium

21Sc 44.956 Scandium

22Ti 47.9 Titanium

23V 50.941 Vanadium

24Cr 51.996 Chromium

25Mn 54.938 Manganese

26Fe 55.847 Iron

27Co 58.933 Cobalt

28Ni 58.71 Nickel

29Cu 63.546 Copper

30Zn 65.38 Zinc

31Ga 69.72 Gallium

32Ge 72.59 Germanium

33As 74.922 Arsenic

34Se 78.96 Selenium

35Br 79.904 Bromine

36Kr 83.8 Krypton

37Rb 85.467 Rubidium

38Sr 87.62 Strontium

39Y 88.906 Yttrium

40Zr 91.22 Zirconium

41Nb 92.906 Niobium

42Mo 95.94 Molybdenum

43Tc 98.906 Technetium

44Ru 101.07 Ruthenium

45Rh 102.906 Rhodium

46Pd 106.4 Palladium

47Ag 107.868 Silver

48Cd 112.4 Cadmium

49In 114.82 Indium

50Sn 118.69 Tin

51Sb 121.75 Antimony

52Te 127.6 Tellurium

53I 126.905 Iodine

54Xe 131.3 Xenon

55Cs 132.905 Caesium

56Ba 137.34 Barium

57La 138.906 Lanthanum

72Hf 178.49 Hafnium

73Ta 180.948 Tantalum

74W 183.85 Tungsten

75Re 186.2 Rhenium

76Os 190.2 Osmium

77Ir 192.22 Iridium

78Pt 195.09 Platinum

79Au 196.967 Gold

80Hg 200.59 Mercury

81Tl 204.37 Thallium

82Pb 207.2 Lead

83Bi 208.98 Bismuth

84Po [210] Polonium

85At [210] Astatine

86Rn [222] Radon

87Fr [223] Francium

88Ra 226.025 Radium

89Ac [227] Actinium

104Rf [257] Rutherfordium

105Db [260] Dubnium

106Sg [263] Seaborgium

107Bh [262] Bohrium

108Hs [265] Hassium

109Mt [266] Meitnerium

110Ds [271] Darmstadtium

111Rg [284] Roentgenium

112Uub [288] Ununbium

113Uut [193] Ununtrium

114Uuq [298] Ununquadium

115Uup [299] Ununpentium

116Uuh [302] Ununhexium

117Uus [310] Ununseptium

118Uuo [314] Ununoctium

58Ce 140.12 Cerium

59Pr 140.908 Praseodymium

60Nd 144.24 Neodymium

61Pm [145] Promethium

62Sm 150.4 Samarium

63Eu 151.96 Europium

64Gd 157.25 Gadolinium

65Tb 158.925 Terbium

66Dy 162.5 Dysprosium

67Ho 164.93 Holmium

68Er 167.26 Erbium

69Tm 168.934 Thulium

70Yb 173.04 Ytterbium

71Lu 174.97 Lutetium

90Th 232.038 Thorium

91Pa 231.036 Protactinium

92U 238.029 Uranium

93Np 237.048 Neptunium

94Pu [244] Plutonium

95Am [243] Americium

96Cm [247] Curium

97Bk [247] Berkelium

98Cf [251] Californium

99Es [254] Einsteinium

100Fm [257] Fermium

101Md [258] Mendelevium

102No [255] Nobelium

103Lr [256] Lawrencium