Atomic Weights and Isotopic Compositions for Tantalum
 Isotope   Relative
Atomic Mass 		    Isotopic
  Composition  		 Standard
Atomic Weight 		  Notes 
 
73 Ta 180 179.947 4648(24)   0.000 1201(32)  180.947 88(2)  
181 180.947 9958(20)   0.999 8799(32)

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