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Appendix A 1551
Atomic Number, Z
Name
Atomic Mass Symbol Atomic Number, A Mass (u)
Percent Abundance or Half-life, Decay Mode t1/2
74 73.921 177 36.5%
33 Arsenic 75 74.921 594 100%
34 Selenium 80 79.916 520 49.7%
35 Bromine 79 78.918 336 50.69%
36 Krypton 84 83.911 507 57.0%
37 Rubidium 85 84.911 794 72.17%
38 Strontium 86 85.909 267 9.86%
88 87.905 619 82.58%
90 89.907 738 28.8 y
39 Yttrium 89 88.905 849 100%
90 89.907 152 64.1 h
40 Zirconium 90 89.904 703 51.45%
41 Niobium 93 92.906 377 100%
42 Molybdenum 98 97.905 406 24.13%
43 Technetium 98 97.907 215
44 Ruthenium 102 101.904 348 31.6%
45 Rhodium 103 102.905 500 100%
46 Palladium 106 105.903 478 27.33%
47 Silver 107 106.905 092 51.84%
109 108.904 757 48.16%
48 Cadmium 114 113.903 357 28.73%
49 Indium 115 114.903 880 95.7%,
50 Tin 120 119.902 200 32.59%
51 Antimony 121 120.903 821 57.3%
52 Tellurium 130 129.906 229 33.8%,
53 Iodine 127 126.904 473 100%
131 130.906 114 8.040 d
54 Xenon 132 131.904 144 26.9%
136 135.907 214 8.9%
55 Cesium 133 132.905 429 100%
