Lanthanum Definition

lănthə-nəm
noun
A soft, malleable, silvery chemical element, one of the rare-earth elements and the first member of the lanthanide series: symbol, La; at. no. 57
Webster's New World
Synonyms:
  • atomic number 57
  • la
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Origin of Lanthanum

  • New Latin from Greek lanthanein to escape notice (from the finding of the element hidden in oxide of cerium)

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

  • From Ancient Greek λανθάνω (lanthanō, “escape notice"), because it had gone long undetected in mineral ores.

    From Wiktionary

Lanthanum Sentence Examples

  • In 1841 Mosander, having in 1839 discovered a new element lanthanum in the mineral cerite, isolated this element and also a hitherto unrecognized substance, didymia, from crude yttria, and two years later he announced the determination of two fresh constituents of the same earth, naming them erbia and terbia.

  • Lanthanum oxide, La203, is a white powder obtained by burning the metal in oxygen, or by ignition of the carbonate, nitrate or sulphate.

  • Lanthanum hydroxide, La(OH) 3, is a white amorphous powder formed by precipitating lanthanum salts by potassium hydroxide.

  • By evaporation of a solution of lanthanum oxide in hydrochloric acid to the consistency of a syrup, and allowing the solution to stand, large colourless crystals of a hydrated chloride of the composition 2LaC1 3.15H 2 O are obtained.

  • Lanthanum sulphide, La 2 S 3, is a yellow powder, obtained when the oxide is heated in the vapour of carbon bisulphide.

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Words Starting With

LLALAN

Words Ending With

MUMNUM

Unscrambles

lanthanum

Words Starting With L and Ending With M

Starts With L & Ends With MStarts With LA & Ends With MStarts With L & Ends With UM

Word Length

9 Letter Words9 Letter Words Starting With L9 Letter Words Ending With M
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