rubidium

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The Simple English Wikipedia has an article on:

krypton 37 strontium

Pronunciation[change]

  • (UK) IPA: /ˌɹʊuˈbɪd.iː.ʌm/ SAMPA: /%ru:"bId.i:.Vm/

Noun[change]

Singular
rubidium

Plural
none

  1. (uncountable) Rubidium is a chemical element (symbol Rb) with an atomic number of 37. It is a soft silver-coloured metal.