Explanatory notes
… and 132, xenon 133, caesium 137, thulium 170, iridium 192, gold 198, and polonium 210. Radioactive chemical elements … or treating certain diseases (cobalt 60, iodine 131, gold 198, phosphorus 32, etc.). (c) In agriculture , e.g., … such as residues from the manufacture of superphosphates or gold‑mine waste. The normal process is reduction of the …