Column Descriptions Relative Isotopic Standard Isotope Atomic Mass Composition Atomic Weight Notes _________________________________________________________________________ 50 Sn 112 111.90482387(61) 0.0097(1) 118.710(7) g 114 113.9027827(10) 0.0066(1) 115 114.903344699(16) 0.0034(1) 116 115.90174280(10) 0.1454(9) 117 116.90295398(52) 0.0768(7) 118 117.90160657(54) 0.2422(9) 119 118.90331117(78) 0.0859(4) 120 119.90220163(97) 0.3258(9) 122 121.9034438(26) 0.0463(3) 124 123.9052766(11) 0.0579(5) _________________________________________________________________________NIST | Physical Measurement Laboratory | Physical Reference Data | Atomic Weights and Isotopic Compositions Main Page