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Kr-78 ( 0.35% , 2.0E+21 ) Kr-80 ( 2.25% ) Kr-82 ( 11.6% ) Kr-83 ( 11.5% ) Kr-84 ( 57.0% ) Kr-86 ( 17.3% ) Isotopes: Kr-69 Kr-70 Kr-71 Kr-72 Kr-73 Kr-74 Kr-75 Kr-76 Kr-77 Kr-79 Kr-81 Kr-85 Kr-87 Kr-88 Kr-89 Kr-90 Kr-91 Kr-92 Kr-93 Kr-94 Kr-95 Kr-96 Kr-97 For information on elements, we recommend  . |