CHEM 106 Lecture Notes - Lecture 23: Strontium-90, Sesquioxide, Caesium
13 Mar 2019
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11:50 pm: the ten elements listed in table 22. 2 are found in the human body but are classi- fied as nonessential. It is believed that rb1 is retained by the body because of the similarity of its size and chemistry to that of k1. Like the other cations of group 1, cesium ions (cs1) are also readily absorbed by the body. Cesium cations have no known function, although they can substitute for. In most cases, the concentration of cesium in the environment is low, so exposure to cs1 is not a health concern. The nuclear accident at chernobyl in 1986, however, released significant quantities of radio- active 137cs into the environment. These ions do find their way into human bones, where they replace ca21 ions. At the low con- centrations of sr21 and ba21 that are typically present in the human body, these elements appear to be benign.
