The clock uses a rubidium vapor lamp and a glass cell containing rubidium. A voltage-controlled oscillator excites the cell with a 6.8 GHz signal. Rubidium atoms can exist in three states.
IN the process of absorption by plant roots ... Examples of mutually competing ions are the pairs potassium–rubidium 1 and calcium–strontium 2. Neither sodium nor lithium competes readily ...
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