Atomic Weights and Isotopic Compositions for Antimony
 Isotope   Relative
Atomic Mass 		    Isotopic
  Composition  		 Standard
Atomic Weight 		  Notes 
 
51 Sb 121 120.903 8120(30)   0.5721(5)  121.760(1) g
123 122.904 2132(23)   0.4279(5)

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