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rubidium
/ru'bɪdiəm/
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rubidium
noun
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
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atomic number 37
rb
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type of:
metal
metallic element
Synonyms & Similar Words
metal
rb
atomic number 37
metallic element
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