Transcription
-
- US Pronunciation
- US IPA
- UK Pronunciation
- UK IPA
-
- [roo-bid-ee-uh m]
- /ruˈbɪd i əm/
- /ruːˈbɪdɪəm/
-
- US Pronunciation
- US IPA
-
- [roo-bid-ee-uh m]
- /ruˈbɪd i əm/
Definitions of rubidium word
- noun rubidium a silver-white, metallic, active element resembling potassium, used in photoelectric cells and radio vacuum tubes. Symbol: Rb; atomic weight: 85.47; atomic number: 37; specific gravity: 1.53 at 20°C. 1
- noun rubidium chemical element 1
- noun rubidium a soft highly reactive radioactive element of the alkali metal group; the 16th most abundant element in the earth's crust (310 parts per million), occurring principally in pollucite, carnallite, and lepidolite. It is used in electronic valves, photocells, and special glass. Symbol: Rb; atomic no: 37; atomic wt: 85.4678; half-life of 87Rb: 5 × 1011 years; valency: 1, 2, 3, or 4; relative density: 1.532 (solid), 1.475 (liquid); melting pt: 39.48°C; boiling pt: 688°C 0
- noun rubidium a soft, silvery-white, metallic chemical element, one of the alkali metals, that ignites spontaneously in air and reacts violently in water: used in photocells and in filaments of vacuum tubes: symbol, Rb; at. no., 37 0
Information block about the term
Origin of rubidium
First appearance:
before 1860 One of the 29% newest English words
1860-65; < New Latin, equivalent to Latin rūbid(us) red (in allusion to the two red lines in its spectrum) + -ium -ium
Historical Comparancy
Parts of speech for Rubidium
noun
adjective
verb
adverb
pronoun
preposition
conjunction
determiner
exclamation
rubidium popularity
A pretty common term. Usually people know it’s meaning, but prefer to use a more spread out synonym. About 66% of English native speakers know the meaning and use word.
This word is included in each student's vocabulary. Most likely there is at least one movie with this word in the title.
rubidium usage trend in Literature
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See also
Matching words
- Words starting with r
- Words starting with ru
- Words starting with rub
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- Words starting with rubid
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- Words starting with rubidiu
- Words starting with rubidium