H 1.008 He 4.003 Li 6.939 Be 9.012 B 10.811 C 12.011 N 14.007 O 15.999 F 18.998 Ne 20.183 Na 22.990 Mg 24.312 Al 26.98 Si 28.086 P 30.974 S 32.064 Cl 35.453 Ar 39.942 K 39.102 Ca 40.08 Sc 44.956 Ti 47.90 V 50.942 Cr 51.996 Mn 54.938 Fe 55.847 Co 58.933 Ni 58.71 Cu 63.546 Zn 65.37 Ga 69.72 Ge 72.59 As 74.922 Se 78.96 Br 79.904 Kr 83.80 Rb 85.47 Sr 87.62 Y 88.905 Zr 91.22 Nb 92.906 Mo 95.94 Tc 99 Ru 101.07 Rh 102.91 Pd 106.4 Ag 107.87 Cd 112.40 In 114.82 Sn 118.69 Sb 121.75 Te 127.60 I 126.90 Xe 131.30 Cs 132.91 Ba 137.34 La 138.91 Ce 140.12 Pr 140.91 Nd 144.24 Pm 147 Sm 150.35 Eu 151.96 Gd 157.25 Tb 158.92 Dy 162.50 Ho 164.93 Er 167.26 Tm 168.93 Yb 173.04 Lu 174.97 Hf 178.49 Ta 180.95 W 183.85 Re 186.2 Os 190.2 Ir 192.2 Pt 195.09 Au 196.97 Hg 200.59 Tl 204.37 Pb 207.19 Bi 208.98 Po 210 At 210 Rn 222 Fr 223 Ra 226 Ac 227 Th 232.04 Pa 231 U 238.03 Np 237 Pu 242 Am 243 Cm 247 Bk 249 Cf 251 Es 254 Fm 253 Md 256 No 254 Lr 257 Db 262 Sg 263 Bh 262 Hs 265 Mt 266