iupac_massas atomicas

8/4/2019 iupac_massas atomicas

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of Elements in Atomic Number Order.

At No SymbolName Atomic Wt Notes

1 H Hydrogen 1.00794(7) 1, 2, 3

2 He Helium 4.002602(2) 1, 2

3 Li Lithium [6.941(2)] 1, 2, 3,

4 Be Beryllium 9.012182(3)

5 B Boron 10.811(7) 1, 2, 3

6 C Carbon 12.0107(8) 1, 2

7 N Nitrogen 14.0067(2) 1, 2

8 O Oxygen 15.9994(3) 1, 2

9 F Fluorine 18.9984032(5)

10 Ne Neon 20.1797(6) 1, 3

11 Na Sodium 22.98976928(2)

12 Mg Magnesium 24.3050(6)

13 Al Aluminium 26.9815386(8)

14 Si Silicon 28.0855(3) 2

15 P Phosphorus 30.973762(2)16 S Sulfur 32.065(5) 1, 2

17 Cl Chlorine 35.453(2) 3

18 Ar Argon 39.948(1) 1, 2

19 K Potassium 39.0983(1) 1

20 Ca Calcium 40.078(4) 1

21 Sc Scandium 44.955912(6)

22 Ti Titanium 47.867(1)

23 V Vanadium 50.9415(1)

24 Cr Chromium 51.9961(6)

25 Mn Manganese 54.938045(5)26 Fe Iron 55.845(2)

27 Co Cobalt 58.933195(5)

28 Ni Nickel 58.6934(4)

29 Cu Copper 63.546(3) 2

30 Zn Zinc 65.38(2)

31 Ga Gallium 69.723(1)

32 Ge Germanium 72.64(1)

33 As Arsenic 74.92160(2)

34 Se Selenium 78.96(3)

35 Br Bromine 79.904(1)36 Kr Krypton 83.798(2) 1, 3

37 Rb Rubidium 85.4678(3) 1

38 Sr Strontium 87.62(1) 1, 2

39 Y Yttrium 88.90585(2)

40 Zr Zirconium 91.224(2) 1

41 Nb Niobium 92.90638(2)

42 Mo Molybdenum 95.96(2) 1

43 Tc Technetium [98] 5


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44 Ru Ruthenium 101.07(2) 1

45 Rh Rhodium 102.90550(2)

46 Pd Palladium 106.42(1) 1

47 Ag Silver 107.8682(2) 1

48 Cd Cadmium 112.411(8) 1

49 In Indium 114.818(3)

50 Sn Tin 118.710(7) 1

51 Sb Antimony 121.760(1) 152 Te Tellurium 127.60(3) 1

53 I Iodine 126.90447(3)

54 Xe Xenon 131.293(6) 1, 3

55 Cs Caesium 132.9054519(2)

56 Ba Barium 137.327(7)

57 La Lanthanum 138.90547(7) 1

58 Ce Cerium 140.116(1) 1

59Pr Praseodymiu 140.90765(2)

60 Nd Neodymium 144.242(3) 1

61 Pm Promethium [145] 562 Sm Samarium 150.36(2) 1

63 Eu Europium 151.964(1) 1

64 Gd Gadolinium 157.25(3) 1

65 Tb Terbium 158.92535(2)

66 Dy Dysprosium 162.500(1) 1

67 Ho Holmium 164.93032(2)

68 Er Erbium 167.259(3) 1

69 Tm Thulium 168.93421(2)

70 Yb Ytterbium 173.054(5) 1

71 Lu Lutetium 174.9668(1) 172 Hf Hafnium 178.49(2)

73 Ta Tantalum 180.94788(2)

74 W Tungsten 183.84(1)

75 Re Rhenium 186.207(1)

76 Os Osmium 190.23(3) 1

77 Ir Iridium 192.217(3)

78 Pt Platinum 195.084(9)

79 Au Gold 196.966569(4)

80 Hg Mercury 200.59(2)

81 Tl Thallium 204.3833(2)

82 Pb Lead 207.2(1) 1, 2

83 Bi Bismuth 208.98040(1)

84 Po Polonium [209] 5

85 At Astatine [210] 5

86 Rn Radon [222] 5

87 Fr Francium [223] 5

88 Ra Radium [226] 5

89 Ac Actinium [227] 5


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90 Th Thorium 232.03806(2) 1, 5

91 Pa Protactinium 231.03588(2) 5

92 U Uranium 238.02891(3) 1, 3, 5

93 Np Neptunium [237] 5

94 Pu Plutonium [244] 5

95 Am Americium [243] 5

96 Cm Curium [247] 5

97 Bk Berkelium [247] 598 Cf Californium [251] 5

99 Es Einsteinium [252] 5

100 Fm Fermium [257] 5

101 Md Mendelevium [258] 5

102 No Nobelium [259] 5

103 Lr Lawrencium [262] 5

104 Rf Rutherfordium[267] 5

105 Db Dubnium [268] 5

106 Sg Seaborgium [271] 5

107 Bh Bohrium [272] 5108 Hs Hassium [270] 5

109 Mt Meitnerium [276] 5

110 Ds Darmstadtium[281] 5

111 Rg Roentgenium [280] 5

112 Cn Copernicium [285] 5, 6

113 Uut Ununtrium [284] 5, 6

114 Uuq Ununquadium [289] 5, 6

115 Uup Ununpentium [288] 5, 6

116 Uuh Ununhexium [293] 5, 6

118 Uuo Ununoctium [294] 5, 6


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of Elements in Name Order.

At No Name Notes

89 Ac Actinium [227] 5

13Al

95 Am [243] 5

51 Sb Antimony 1

18 Ar Argon 1, 2

33 As Arsenic

85 At Astatine [210] 5

56 Ba Barium

97 Bk [247] 5

4 Be Beryllium

83 Bi Bismuth

107 Bh Bohrium [272] 5

5 B Boron 1, 2, 3

35 Br Bromine

48 Cd Cadmium 1

55 Cs Caesium20 Ca Calcium 1

98 Cf [251] 5

6 C Carbon 1, 2

58 Ce Cerium 1

17 Cl Chlorine 3

24 Cr

27 Co Cobalt

112 Cn [285] 5, 6

29 Cu Copper 2

96 Cm Curium [247] 5

110 Ds [281] 5

105 Db Dubnium [268] 5

Symbol

AtomicWt

Aluminium

26.9815386(8)

Americium

121.760(1)

1)

74.92160(2)

137.327(7)

Berkeliu

m9.012182(3)

208.98040(1)

7)

1)

112.411(8)

132.905

4519(2)4)

Californium

12.0107(8)

140.116(1)

2)

Chromium

51.9961(6)

58.933195(5)

Copernicium

3)

Darmstadtium


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66 Dy 1

99 Es [252] 5

68 Er Erbium 1

63 Eu Europium 1

100 Fm Fermium [257] 5

9 F Fluorine

87 Fr Francium [223] 5

64 Gd 1

31 Ga Gallium

32 Ge 72.64(1)

79 Au Gold72 Hf Hafnium

108 Hs Hassium [270] 5

2 He Helium 1, 2

67 Ho Holmium

1 H 1, 2, 3

49 In Indium

53 I Iodine

77 Ir Iridium

26 Fe Iron

36 Kr Krypton 1, 3

57 La 1

103 Lr [262] 5

82 Pb Lead 207.2(1) 1, 2

3 Li Lithium

71 Lu Lutetium 1

12 Mg

25 Mn

109 Mt [276] 5

Dysprosium

162.500(1)

Einsteinium

167.259(3)

151.964(1)

18.9984032(5)

Gadolinium

157.25(3)

1)

Germanium

196.966

569(4)2)

4.002602(2)

164.93032(2)

Hydrogen

1.00794(7)

114.818(3)

126.90447(3)

192.217(3)

2)

2)

Lanthanum

138.90547(7)

Lawrencium

[6.941(2)]

1, 2, 3,4

174.9668(1)

Magnesium

24.3050(6)

Manganese

54.938045(5)

Meitnerium


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101 Md [258] 5

80 Hg Mercury

42 Mo 95.96(2) 1

60 Nd 1

10 Ne Neon 1, 3

93 Np [237] 5

28 Ni Nickel

41 Nb Niobium

7 N Nitrogen 1, 2

102 No Nobelium [259] 5

76 Os Osmium 1

8 O Oxygen 1, 2

46 Pd 1

15 P

78 Pt Platinum

94 Pu [244] 5

84 Po Polonium [209] 5

19 K 1

59Pr

61 Pm [145] 5

91 Pa 5

88 Ra Radium [226] 5

86 Rn Radon [222] 5

75 Re Rhenium

45 Rh Rhodium

111 Rg [280] 5

37 Rb Rubidium 1

44 Ru 1

Mendelevium

2)

Molybdenum

Neodymium

144.242(3)

20.1797(6)

Neptunium

58.6934(4)

92.90638(2)

14.0067(2)

3)

15.9994(3)

Palladium

106.42(1)

Phosphorus

30.973762(2)

195.084(9)

Plutonium

Potassium

39.0983(1)

Praseodymium

140.90765(2)

Promethium

Protactinium

231.03588(2)

186.207(1)

102.90550(2)

Roentgenium

85.4678(3)

Ruthenium

101.07(2)


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104 Rf [267] 5

62 Sm 1

21Sc

106 Sg [271] 5

34 Se Selenium 78.96(3)

14 Si Silicon 2

47 Ag Silver 1

11 Na Sodium

38 Sr 87.62(1) 1, 2

16 S Sulfur 1, 2

73 Ta Tantalum

43 Tc [98] 5

52 Te Tellurium 1

65 Tb Terbium

81 Tl Thallium

90 Th Thorium 1, 5

69 Tm Thulium

50 Sn Tin 1

22 Ti Titanium

74 W Tungsten

116 Uuh [293] 5, 6

118 Uuo [294] 5, 6

115 Uup [288] 5, 6

114 Uuq [289] 5, 6

113 Uut [284] 5, 6

92 U Uranium 1, 3, 5

Rutherfordium

Samarium

150.36(2)

Scandium

44.955912(6)

Seaborgium

28.0855(3)

107.8682(2)

22.98976928(2)

Strontium

5)

180.94788(2)

Technetium

127.60(3)

158.92535(2)

204.3833(2)

232.038

06(2)168.93421(2)

118.710(7)

1)

1)

Ununhexium

Ununoctium

Ununpentium

Ununquadium

Ununtrium

238.02891(3)


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23 V

54 Xe Xenon 1, 3

70 Yb 1

39 Y Yttrium

30 Zn Zinc 65.38(2)

40 Zr 1

Vanadium

50.9415(1)

131.293(6)

Ytterbium

173.054(5)

88.90585(2)

Zirconium

91.224(2)


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Geological specimens are known in which the element has an

Range in isotopic composition of normal te

Modified isotopic compositions may be found in commercially

Commercially available Li materials have atomic weights th

Element has no stable nuclides. The value enclosed in braccha

The names and symbols for elements 112-

Geological specimens are known in which the element has an

Range in isotopic composition of normal teModified isotopic compositions may be found in commercially

Commercially available Li materials have atomic weights th

Element has no stable nuclides. The value enclosed in braccha

The names and symbols for elements 112-


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isotopic composition outside the limits for normal material. Thgiven in the Table may exceed the stated uncer

restrial material prevents a more precise value being given; t

available material because it has been subject to an undisclothe element from that given in the Table can o

t range between 6.939 and 6.996; if a more accurate value istable 6.94 and 6.99].

ets, e.g. [209], indicates the mass number of the longest-liveacteristic terrestrial isotopic composition, and for these an at118 are under review. The temporary system recommended b

isotopic composition outside the limits for normal material. Thgiven in the Table may exceed the stated uncer

restrial material prevents a more precise value being given; tavailable material because it has been subject to an undisclo

the element from that given in the Table can ot range between 6.939 and 6.996; if a more accurate value is

table 6.94 and 6.99].ets, e.g. [209], indicates the mass number of the longest-liveacteristic terrestrial isotopic composition, and for these an at118 are under review. The temporary system recommended b


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difference between the atomic weight of the element in sucainty.e tabulated value should be applicable to any normal materia

ed or inadvertant isotopic fractionation. Substantial deviationcur.required, it must be determined for the specific material [ran

isotope of the element. However three such elements (Th, Pamic weight is tabulated.y J Chatt, Pure Appl. Chem., 51, 381-384 (1979) is used above

difference between the atomic weight of the element in sucainty.e tabulated value should be applicable to any normal materiaed or inadvertant isotopic fractionation. Substantial deviationcur.required, it must be determined for the specific material [ran

isotope of the element. However three such elements (Th, Pamic weight is tabulated.y J Chatt, Pure Appl. Chem., 51, 381-384 (1979) is used above


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specimens and that

l.

in atomic weight of

e quoted for 1995

, and U) do have a

.

specimens and that

l.in atomic weight of

e quoted for 1995

, and U) do have a

.

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