Origin of rubidium
Related formsru·bid·ic, adjective
Examples from the Web for rubidium
Rubidium and cæsium were discovered in this way, rubidium having bright red lines and cæsium a very intense blue line.An Elementary Study of Chemistry|William McPherson
Rubidium occurs widely diffused in nature, but in very small quantities.
Thus Bunsen in 1860 discovered two new alkaline metals, Cæsium and Rubidium.Logic, Inductive and Deductive|William Minto
Rubidium platino-chloride is much less soluble than the potassium salt.
Lithia and fluorine are each present to the extent of about 5%; rubidium and caesium are sometimes present in small amounts.