2012 日本化学会 原子量表 - chemistry.or.jp

1 2012 .. 1961 12 12C 12 .. IUPAC CIAAW . 2 . 4 2012 IUPAC 2009 . IUPAC CIAAW 1 2 .. 2009 IUPAC 10 . 2011 IUPAC 10 .. 2011 . 10 .. g . m . r . 1 2010 .. best measurement 3 000 05 2010 . 1/1000 .. 1 .. 1 * .. SLAP GISP VSMOW.. %C 0C* 5K1 NBS 30.. IUPAC .. NBS 22.. 1. IUPAC Inorganic chemistry Division, CIAAW : Atomic Weights of the Elements .. 2009, ., 83, 359 2011 .. NGS2 NGS1. NGS3. 2. J. R. De Laater . : Atomic Weights of the Elements : Review 2000, .., 75, 683 2003 .. 3. IUPAC Inorganic chemistry Division, CIAAW : Isotopic Compositions of the Ele- .. ments 2009, ., 83, 397 2011 . 2012 . 2012 . 12 C 12 12C . 12.. 10 . ; E E r E . r . ; . 74 E . r 2 . 113 118 .. 1 H ; m 60 Nd 3 g 2 He 2 g r 61 Pm 3 Li ; m 62 Sm 2 g 4 Be 3 63 Eu 1 g 5 B ; m 64 Gd 3 g 6 C ; 65 Tb 2 . 7 N ; 66 Dy 1 g 8 O ; 67 Ho 2.

2 9 F 5 68 Er 3 g 10 Ne 6 gm 69 Tm 2 . 11 Na 2 70 Yb 5 g 12 Mg 6 71 Lu 1 g 13 Al 8 72 Hf 2 . 14 Si ; 73 Ta 2 . 15 P 2 74 W 1 . 16 S ; 75 Re 1 . 17 Cl ; m 76 Os 3 g 18 Ar 1 g r 77 Ir 3 . 19 K 1 78 Pt 9 . 20 Ca 4 79 Au 4 . 21 Sc 6 80 Hg 2 . 22 Ti 1 81 Tl ; . 23 V 1 82 Pb 1 g r . 24 Cr 6 83 Bi 1 . 25 Mn 5 84 Po 26 Fe 2 85 At 27 Co 5 86 Rn 28 Ni 4 r 87 Fr 29 Cu 3 r 88 Ra 30 Zn 2 r 89 Ac 31 Ga 1 90 Th 2 g 32 Ge 1 91 Pa 2 .. 33 As 2 92 U 3 gm 34 Se 3 93 Np 35 Br 1 94 Pu 36 Kr 2 gm 95 Am 37 Rb 3 g 96 Cm 38 Sr 1 g r 97 Bk 39 Y 2 98 Cf 40 Zr 2 g 99 Es 41 Nb 2 100 Fm 42 Mo 2 g 101 Md 43 Tc 102 No 44 Ru 2 g 103 Lr 45 Rh 2 104 Rf 46 Pd 1 g 105 Db 47 Ag 2 g 106 Sg 48 Cd 8 g 107 Bh 49 In 3 108 Hs 50 Sn 7 g 109 Mt 51 Sb 1 g 110 Ds 52 Te 3 g 111 Rg 53 I 3 112 Cn 54 Xe 6 gm 113 Uut 55 Cs 2 114 Uuq 56 Ba 7 115 Uup 57 La 7 g 116 Uuh 58 Ce 1 g 118 Uuo 59 Pr 2.

3 G .. m .. r .. 2012 . Standard Atomic Weights 2012. Using C 12 as reference, where 12C is an unbound neutral atom in its nuclear and electronic ground state.. r 12. The atomic weights, r E ,of many elements vary due to variations in the abundances of their isotopes in natural terrestrial materials. For 10 of these ele- ments, an atomic weight interval is given with the symbol ; to denote the set of atomic weight values in normal materials ; thus, r E for ele- ment E. The symbols and denote the bounds of the interval ; . For 74 elements, r E values and their decisional uncertainties in parentheses, following the last signi cant gure to which they are attributed are given. The footnotes to this table elaborate the types of variation that may occur for individual elements and that may be larger than the listed uncertainties of values of r E or may lie outside the values listed.

4 Names of elements with atomic number 113 to 118 are provisional. Atomic Atomic Atomic Atomic Name Symbol Footnotes Name Symbol Footnotes Number Weight Number Weight 1 hydrogen H ; m 60 neodymium Nd 3 g 2 helium He 2 g r 61 promethium Pm 3 lithium Li ; m 62 samarium Sm 2 g 4 beryllium Be 3 63 europium Eu 1 g 5 boron B ; m 64 gadolinium Gd 3 g 6 carbon C ; 65 terbium Tb 2 . 7 nitrogen N ; 66 dysprosium Dy 1 g 8 oxygen O ; 67 holmium Ho 2 . 9 fluorine F 5 68 erbium Er 3 g 10 neon Ne 6 gm 69 thulium Tm 2 . 11 sodium Na 2 70 ytterbium Yb 5 g 12 magnesium Mg 6 71 lutetium Lu 1 g 13 aluminium aluminum Al 8 72 hafnium Hf 2 . 14 silicon Si ; 73 tantalum Ta 2 . 15 phosphorus P 2 74 tungsten W 1 . 16 sulfur S ; 75 rhenium Re 1 . 17 chlorine Cl ; m 76 osmium Os 3 g 18 argon Ar 1 g r 77 iridium Ir 3 . 19 potassium K 1 78 platinum Pt 9.

5 20 calcium Ca 4 79 gold Au 4 . 21 scandium Sc 6 80 mercury Hg 2 . 22 titanium Ti 1 81 thallium Tl ; . 23 vanadium V 1 82 lead Pb 1 g r 24 chromium Cr 6 83 bismuth Bi 1 . 25 manganese Mn 5 84 polonium Po 26 iron Fe 2 85 astatine At 27 cobalt Co 5 86 radon Rn 28 nickel Ni 4 r 87 francium Fr 29 copper Cu 3 r 88 radium Ra 30 zinc Zn 2 r 89 actinium Ac 31 gallium Ga 1 90 thorium Th 2 g 32 germanium Ge 1 91 protactinium Pa 2 . 33 arsenic As 2 92 uranium U 3 gm 34 selenium Se 3 93 neptunium Np 35 bromine Br 1 94 plutonium Pu 36 krypton Kr 2 gm 95 americium Am 37 rubidium Rb 3 g 96 curium Cm 38 strontium Sr 1 g r 97 berkelium Bk 39 yttrium Y 2 98 californium Cf 40 zirconium Zr 2 g 99 einsteinium Es 41 niobium Nb 2 100 fermium Fm 42 molybdenum Mo 2 g 101 mendelevium Md 43 technetium Tc 102 nobelium No 44 ruthenium Ru 2 g 103 lawrencium Lr 45 rhodium Rh 2 104 rutherfordium Rf 46 palladium Pd 1 g 105 dubnium Db 47 silver Ag 2 g 106 seaborgium Sg 48 cadmium Cd 8 g 107 bohrium Bh 49 indium In 3 108 hassium Hs 50 tin Sn 7 g 109 meitnerium Mt 51 antimony Sb 1 g 110 darmstadtium Ds 52 tellurium Te 3 g 111 roentgenium Rg 53 iodine I 3 112 copernicium Cn 54 xenon Xe 6 gm 113 ununtrium Uut 55 caesium cesium Cs 2 114

6 Ununquadium Uuq 56 barium Ba 7 115 ununpentium Uup 57 lanthanum La 7 g 116 ununhexium Uuh 58 cerium Ce 1 g 118 ununoctium Uuo 59 praseodymium Pr 2 . Element has no stable isotopes. g Geological specimens are known in which the element has an isotopic composition outside the limits for normal material. The di erence between the atomic weight of the element in such specimens and that given in the table may exceed the stated uncertainty. m Modi ed isotopic compositions may be found in commercially available material because the material has been subjected to an undisclosed or inadvertent isotopic frac- tionation. Substantial deviations in atomic weight of the element from that given in the table can occur. r Range in isotopic composition of normal terrestrial material prevents a more precise r E being given the tabulated r E value and uncertainty should be applicable to normal material.

7 2012 . 4 2012 . 12 12C 12 . IUPAC .. 4 1 2 3 .. 1 H 57 La 2 He 58 Ce 3 Li , 59 Pr 4 Be 60 Nd 5 B 61 Pm 145 . 6 C 62 Sm 7 N 63 Eu 8 O 64 Gd 9 F 65 Tb 10 Ne 66 Dy 11 Na 67 Ho 12 Mg 68 Er 13 Al 69 Tm 14 Si 70 Yb 15 P 71 Lu 16 S 72 Hf 17 Cl 73 Ta 18 Ar 74 W 19 K 75 Re 20 Ca 76 Os 21 Sc 77 Ir 22 Ti 78 Pt 23 V 79 Au 24 Cr 80 Hg 25 Mn 81 Tl 26 Fe 82 Pb 27 Co 83 Bi 28 Ni 84 Po 210 . 29 Cu 85 At 210 . 30 Zn 86 Rn 222 . 31 Ga 87 Fr 223 . 32 Ge 88 Ra 226 . 33 As 89 Ac 227 . 34 Se 90 Th 35 Br 91 Pa 36 Kr 92 U 37 Rb 93 Np 237 . 38 Sr 94 Pu 239 . 39 Y 95 Am 243 . 40 Zr 96 Cm 247 . 41 Nb 97 Bk 247 . 42 Mo 98 Cf 252 . 43 Tc 99 99 Es 252 . 44 Ru 100 Fm 257 . 45 Rh 101 Md 258 . 46 Pd 102 No 259 . 47 Ag 103 Lr 262 . 48 Cd 104 Rf 267 . 49 In 105 Db 268 . 50 Sn 106 Sg 271 . 51 Sb 107 Bh 272 . 52 Te 108 Hs 277 . 53 I 109 Mt 276.

8 54 Xe 110 Ds 281 . 55 Cs 111 Rg 280 . 56 Ba 112 Cn 285 .. 2012 . 2012 . 2012 . IUPAC CIAAW .. 2012 2009 .. 4 10 8 231Pa . 10 4 235U .. IUPAC Inorganic chemistry Division, CIAAW : Isotopic Compositions of the Elements 2009, ., 83, 397 2011 .. 1 H 1 70 GMR 19 K 39 44 . 2 70 a 40 1 . 2 He 3 3 G R 41 44 . 4 3 20 Ca 40 156 d G. 3 Li 6 4 b GMR 42 23 . 7 4 43 10 . 4 Be 9 100 44 110 . 5 B 10 7 GMR 46 3 . 11 7 48 21 . 6 C 12 8 G R 21 Sc 45 100. 13 8 22 Ti 46 3 . 7 N 14 20 c G R 47 2 . 15 20 48 3 . 8 O 16 16 G R 49 2 . 17 1 50 2 . 18 14 23 V 50 4 . 9 F 19 100 51 4 . 10 Ne 20 3 GM 24 Cr 50 13 . 21 1 52 18 . 22 3 53 17 . 11 Na 23 100 54 7 . 12 Mg 24 4 25 Mn 55 100. 25 1 26 Fe 54 35 . 26 3 56 36 . 13 Al 27 100 57 10 . 14 Si 28 19 R 58 4 . 29 8 27 Co 59 100. 30 11 28 Ni 58 19 R. 15 P 31 100 60 15 . 16 S 32 26 G R 61 13.

9 33 2 62 40 . 34 24 64 19 . 36 1 29 Cu 63 15 R. 17 Cl 35 10 GMR 65 15 . 37 10 30 Zn 64 75 R. 18 Ar 36 21 G R 66 98 . 38 7 67 16 . 40 25 68 63 . 2012 .. 70 10 119 4 . 31 Ga 69 9 120 9 . 71 9 122 3 . 32 Ge 70 27 124 5 . 72 32 51 Sb 121 5 G. 73 12 123 5 . 74 20 52 Te 120 1 G. 76 12 122 12 . 33 As 75 100 123 3 . 34 Se 74 4 R 124 14 . 76 29 125 15 . 77 16 126 25 . 78 28 128 8 . 80 41 130 62 . 82 22 53 I 127 100. 35 Br 79 7 54 Xe 124 3 GM. 81 7 126 2 . 36 Kr 78 3 GM 128 8 . 80 10 129 82 . 82 31 130 13 . 83 19 131 30 . 84 15 132 33 . 86 41 134 21 . 37 Rb 85 2 G 136 44 . 87 2 55 Cs 133 100. 38 Sr 84 1 G R 56 Ba 130 1 . 86 1 132 1 . 87 1 d 134 18 . 88 1 135 12 . 39 Y 89 100 136 24 . 40 Zr 90 40 G 137 24 . 91 5 138 42 . 92 8 57 La 138 71 G. 94 28 139 71 . 96 9 58 Ce 136 2 G. 41 Nb 93 100 138 2 d 42 Mo 92 30 G 140 51.

10 94 9 142 51 . 95 11 59 Pr 141 100. 96 15 60 Nd 142 40 G. 97 14 143 26 d 98 37 144 19 . 100 31 145 12 . 44 Ru 96 14 G 146 32 . 98 3 148 21 . 99 14 150 28 . 100 7 62 Sm 144 7 G. 101 2 147 18 . 102 14 148 10 . 104 27 149 7 . 45 Rh 103 100 150 1 . 46 Pd 102 1 G 152 16 . 104 8 154 29 . 105 8 63 Eu 151 6 G. 106 3 153 6 . 108 9 64 Gd 152 1 G. 110 9 154 3 . 47 Ag 107 8 G 155 12 . 109 8 156 9 . 48 Cd 106 6 G 157 2 . 108 3 158 7 . 110 18 160 19 . 111 12 65 Tb 159 100. 112 21 66 Dy 156 3 G. 113 12 158 3 . 114 42 160 18 . 116 18 161 42 . 49 In 113 5 162 36 . 115 5 163 42 . 50 Sn 112 1 G 164 54 . 114 1 67 Ho 165 100. 115 1 68 Er 162 5 G. 116 9 164 3 . 117 7 166 36 . 118 9 167 9 . 2012 .. 168 18 189 5 . 170 36 190 2 . 69 Tm 169 100 192 19 . 70 Yb 168 3 G 77 Ir 191 2 . 170 39 193 2 . 171 14 78 Pt 190 2 . 172 13 192 24.