Quantum Physics

A.12 Appendix B An Abbreviated Table of IsotopesMassNumberAtomic Chemical (* Indicates Half-LifeNumber Atomic Radioactive) Atomic Percent (If Radioactive)Z Element Symbol Mass (u) A Mass (u) Abundance T 1/263 Europium Eu 151.964 151 150.919 846 47.81153 152.921 226 52.1964 Gadolinium Gd 157.25 156 155.922 120 20.47158 157.924 100 24.84160 159.927 051 21.8665 Terbium Tb 158.925 34 159 158.925 343 10066 Dysprosium Dy 162.50 162 161.926 796 25.51163 162.928 728 24.90164 163.929 171 28.1867 Holmium Ho 164.930 32 165 164.930 320 10068 Erbium Er 167.6 166 165.930 290 33.61167 166.932 045 22.93168 167.932 368 26.7869 Thulium Tm 168.934 21 169 168.934 211 10070 Ytterbium Yb 173.04 172 171.936 378 21.83173 172.938 207 16.13174 173.938 858 31.8371 Lutecium Lu 174.967 175 174.940 768 97.4172 Hafnium Hf 178.49 177 176.943 220 18.60178 177.943 698 27.28179 178.945 815 13.62180 179.946 549 35.0873 Tantalum Ta 180.947 9 181 180.947 996 99.98874 Tungsten W 183.84 182 181.948 206 26.50(Wolfram) 183 182.950 224 14.31184* 183.950 933 30.64 3 10 17 yr186 185.954 362 28.4375 Rhenium Re 186.207 185 184.952 956 37.40187* 186.955 751 62.60 4.4 10 10 yr76 Osmium Os 190.23 188 187.955 836 13.24189 188.958 145 16.15190 189.958 445 26.26192 191.961 479 40.7877 Iridium Ir 192.217 191 190.960 591 37.3193 192.962 924 62.778 Platinum Pt 195.078 194 193.962 664 32.967195 194.964 774 33.832196 195.964 935 25.24279 Gold Au 196.966 55 197 196.966 552 10080 Mercury Hg 200.59 199 198.968 262 16.87200 199.968 309 23.10201 200.970 285 13.18202 201.970 626 29.8681 Thallium Tl 204.383 3 203 202.972 329 29.524205 204.974 412 70.476(Th C) 208* 207.982 005 3.053 min(Ra C) 210* 209.990 066 1.30 min