Barium definition

bârē-əm, băr-
A soft, silvery-white or yellowish-white alkaline-earth metal, used to deoxidize copper and to absorb trace gases in vacuum tubes, and used in various alloys. Atomic number 56; atomic weight 137.33; melting point 727°C; boiling point 1,897°C; specific gravity 3.62; valence 2.
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A radiopaque solution containing barium sulfate that is used to visualize the gastrointestinal tract on x-rays.
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A silver-white, slightly malleable, metallic chemical element, one of the alkaline-earth metals, found as a carbonate or sulfate and used in alloys: symbol, Ba; at. no. 56
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A soft, silvery-white or yellowish-white alkaline-earth metal, used to deoxidize copper and to absorb trace gases in vacuum tubes, and used in various alloys. Atomic number 56; atomic weight 137.33; melting point 727°C; boiling point 1,897°C; specific gravity 3.62; valence 2; symbol Ba.
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A radiopaque solution containing barium sulfate that is used to visualize the gastrointestinal tract on x-rays.
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A soft, silvery-white metallic element of the alkaline-earth group. It occurs only in combination with other elements, especially in barite. Barium compounds are used in x-raying the digestive system and in making fireworks and white pigments. Atomic number 56; atomic weight 137.33; melting point 725°C; boiling point 1,140°C; specific gravity 3.50; valence 2.
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A metallic chemical element (symbol Ba) with an atomic number of 56.
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Origin of barium

  • bar(yta) –ium

    From American Heritage Dictionary of the English Language, 5th Edition

  • From baryta +‎ -ium.

    From Wiktionary

Barium Sentence Examples

  • The next group may contain the white calcium, barium and strontium carbonates.

  • Beryllium and magnesium are permanent in dry air; calcium, strontium and barium, however, oxidize rapidly on exposure.

  • The metals comprising this group are never found in the uncombined condition, but occur most often in the form of carbonates and sulphates; they form oxides of the type RO, and in the case of calcium, strontium and barium, of the type R02.

  • In 1808 Davy isolated sodium and potassium; he then turned his attention to the preparation of metallic calcium, barium, strontium and magnesium.

  • The barium and magnesium salts of this acid are formed when baryta and magnesia are fused with cobalt sesquioxide.

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