rubidium

n. (Rb) metallic chemical element (Chemistry)

Rubidium (IPA: ) is a chemical element in the periodic table that has the symbol Rb and atomic number 37. Rb is a soft, silvery-white metallic element of the alkali metal group. Rb-87, a naturally occurring isotope, is (slightly) radioactive. Rubidium is very soft and highly reactive, with properties similar to other elements in group 1, like rapid oxidation in air.
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Noun
1. a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
(synonym) Rb, atomic number 37
(hypernym) metallic element, metal
(substance-holonym) carnallite

n. rubidium, metallic chemical element (Chemistry)

n. rubidium, metallic chemical element (Chemistry)