potassium 39

po·tas·si·um 39 (39K),

(pō-tas'ē-ŭm),
Most abundant, nonradioactive isotope of potassium; accounts for 93.1% of natural potassium.

po·tas·si·um 39

(pŏ-tas'ē-ŭm)
Most abundant, nonradioactive isotope of potassium; accounts for 93.1% of natural potassium.
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References in periodicals archive ?
5 Bromine 80 Tellerium 127 Potassium 39 Rubidium 85.