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Rubidium Beginning of Paper The 37th Element is located between potassium and cesium in the first Group on the Periodic Table. It's atomic number is 37and its atomic mass is 85.4678. In French and German it is , in Italian and Spanish it is rubidio. History and General Facts Rubidium was discovered spectr .... Middle of Paper .... other elements. Seawater contains 0.2 ppm, twice the amount of Lithium found in the oceans. Traces are found in seawater plants and animal organisms. Very small traces of Rubidium are found in the leaves of tobacco, tea, and coffee, as well as some other plants. Rubidium is similar to lithium and cesium, which are found in combined forms as complex minerals. It is not found in a pure elemental (metallic) state in nature, but only as compounds in mineral deposits such as pollucite, carnallite, lepidolite, leucite, and zinnwaldite, .... 930 words | 4 pages Subscription Length Price Join 30 days membership (recurring) $19.95 90 days membership (recurring) $39.95 180 days membership (non-recurring) $69.95