occurring radioisotopes, the most stable is radiogenic ²¹⁰Bi with a half-life of 5.012 days. ^210mBi is unusual for being a nuclear isomer with a half-life many orders of magnitude longer than that of the ground state.

List of isotopes

|-id=Bismuth-184| ¹⁸⁴Bi|| style="text-align:right" | 83| style="text-align:right" | 101| 184.001347(131)#| style="text-align:center" | | | ?| ¹⁸⁰Tl| 3+#||-id=Bismuth-184m|

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