# Solar Photospheric and Primordial Abundance # Grevesse and Sauval, 1998, SSRv, 85, 161 # Mean atomic weights from 2001 IUPAC table: www.chem.qmul.ac.uk/iupac/AtWt/ # X=0.73479547 Y=0.248355738 Z=0.0168487927 # => (Z/X)=0.2293 # El Log A Atom Wt. 1 H 12.00 1.0079400 2 He 10.93 4.0026020 3 Li 3.31 6.9410000 4 Be 1.42 9.0121820 5 B 2.79 10.8110000 6 C 8.52 12.0107000 7 N 7.92 14.0067000 8 O 8.83 15.9994000 9 F 4.48 18.9984032 10 Ne 8.08 20.1797000 11 Na 6.32 22.9897700 12 Mg 7.58 24.3050000 13 Al 6.49 26.9815380 14 Si 7.56 28.0855000 15 P 5.56 30.9737610 16 S 7.20 32.0650000 17 Cl 5.28 35.4530000 18 Ar 6.40 39.9480000 19 K 5.13 39.0983000 20 Ca 6.35 40.0780000 21 Sc 3.10 44.9559100 22 Ti 4.94 47.8670000 23 V 4.02 50.9415000 24 Cr 5.69 51.9961000 25 Mn 5.53 54.9380490 26 Fe 7.50 55.8450000 27 Co 4.91 58.9332000 28 Ni 6.25 58.6934000 29 Cu 4.29 63.5460000 30 Zn 4.67 65.4090000 31 Ga 3.13 69.7230000 32 Ge 3.63 72.6400000 33 As 2.37 74.9216000 34 Se 3.41 78.9600000 35 Br 2.63 79.9040000 36 Kr 3.31 83.7980000 37 Rb 2.41 85.4678000 38 Sr 2.92 87.6200000 39 Y 2.23 88.9058500 40 Zr 2.61 91.2240000 41 Nb 1.40 92.9063800 42 Mo 1.97 95.9400000 44 Ru 1.83 101.0700000 45 Rh 1.10 102.9055000 46 Pd 1.70 106.4200000 47 Ag 1.24 107.8682000 48 Cd 1.76 112.4110000 49 In 0.82 114.8180000 50 Sn 2.14 118.7100000 51 Sb 1.03 121.7600000 52 Te 2.24 127.6000000 53 I 1.51 126.9044700 54 Xe 2.17 131.2930000 55 Cs 1.13 132.9054500 56 Ba 2.22 137.3270000 57 La 1.22 138.9055000 58 Ce 1.63 140.1160000 59 Pr 0.80 140.9076500 60 Nd 1.49 144.2400000 62 Sm 0.98 150.3600000 63 Eu 0.55 151.9640000 64 Gd 1.09 157.2500000 65 Tb 0.35 158.9253400 66 Dy 1.17 162.5000000 67 Ho 0.51 164.9303200 68 Er 0.97 167.2590000 69 Tm 0.15 168.9342100 70 Yb 0.96 173.0400000 71 Lu 0.13 174.9670000 72 Hf 0.75 178.4900000 73 Ta -0.13 180.9479000 74 W 0.69 183.8400000 75 Re 0.28 186.2070000 76 Os 1.39 190.2300000 77 Ir 1.37 192.2170000 78 Pt 1.69 195.0780000 79 Au 0.85 196.9665500 80 Hg 1.13 200.5900000 81 Tl 0.83 204.3833000 82 Pb 2.06 207.2000000 83 Bi 0.71 208.9803800 90 Th 0.09 232.0381000 92 U -0.50 238.0289100