 The known isotopes of cadmium range in atomic mass from 94 @.@ 950 u ( <unk> ) to 131 @.@ <unk> u ( <unk> ) . For isotopes lighter than 112 u , the primary decay mode is electron capture and the dominant decay product is element 47 ( silver ) . <unk> isotopes decay mostly through beta emission producing element 49 ( indium ) . 
