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Rb-85 ( 72.165% ) Rb-87 ( 27.835% , 4.75E10 ) Isotopes: Rb-71 Rb-72 Rb-73 Rb-74 Rb-75 Rb-76 Rb-77 Rb-78 Rb-79 Rb-80 Rb-81 Rb-82 Rb-83 Rb-84 Rb-86 Rb-88 Rb-89 Rb-90 Rb-91 Rb-92 Rb-93 Rb-94 Rb-95 Rb-96 Rb-97 Rb-98 Rb-99 Rb-100 Rb-101 Rb-102 For information on elements, we recommend  . |