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lanthanum    音标拼音: [l'ænθənəm]
n. 镧

镧

lanthanum
n 1: a white soft metallic element that tarnishes readily;
occurs in rare earth minerals and is usually classified as
a rare earth [synonym: {lanthanum}, {La}, {atomic number 57}]

Lanthanum \Lan"tha*num\ (l[a^]n"th[.a]*n[u^]m), n. [NL., fr. Gr.
lanqa`nein to lie hid, to be concealed.] (Chem.)
A rare element of the rare earth group of the metals, of
atomic number 57, allied to aluminum. It occurs in certain
rare minerals, as cerite, gadolinite, orthite, etc., and was
so named from the difficulty of separating it from cerium,
didymium, and other rare earth elements with which it is
usually associated. Atomic weight 138.9. Symbol La. [Formerly
written also {lanthanium}.]
[1913 Webster]


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  • Lanthanum - Wikipedia
    Lanthanum is a chemical element; it has symbol La and atomic number 57 It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype
  • Lanthanum Facts, Symbol, Discovery, Properties, Uses
    Lanthanum (pronunciation: LAN-the-nem) [3] is a soft, silvery rare-earth metal belonging to the lanthanoids family and represented by the chemical symbol La [1, 2]
  • Lanthanum | Rare Earth Element, Uses in Technology, Medicine | Britannica
    lanthanum (La), chemical element, a rare-earth metal of Group 3 of the periodic table, that is the prototype of the lanthanide series of elements Lanthanum is a ductile and malleable silvery white metal that is soft enough to be cut with a knife
  • Lanthanum - Element information, properties and uses | Periodic Table
    Element Lanthanum (La), Group 19, Atomic Number 57, d-block, Mass 138 905 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Facts About Lanthanum - Live Science
    Lanthanum is silvery white, malleable, ductile and so soft you can slice it with a knife It is one of the most reactive rare-earth metals, which are also called lanthanides
  • Lanthanum Facts – Atomic Number 57 or Symbol La
    Lanthanum is a soft, silvery-white metallic element with the symbol La and atomic number 57 It is the first element in the lanthanide series and is a rare earth element Lanthanum has significant applications in modern technology, ranging from catalysis to advanced optical materials
  • Lanthanum Element | Uses, Facts, Physical Chemical Characteristics
    Lanthanum is a whitish silver metal It is malleable and soft and can be cut with a knife It is the first member of the lanthanide series of the periodic table, that is comprised of fifteen similar elements Lanthanum is also the first member of the transition metals of the 6 th period
  • Lanthanum (La) Element: Properties, Uses, Reactions, Effects
    Lanthanum is a chemical element with the atomic number 57 and is represented by the symbol ‘La’ in the periodic table It is soft and silvery in appearance and classified as rare earth metal and belongs to the d-block of the lanthanide group of the periodic table
  • Comprehensive Guide to Lanthanum: Uses, Properties, and Applications
    Explore the comprehensive guide on Lanthanum, a rare-earth element with wide-ranging applications Learn about its history, physical and chemical properties, industrial uses in fluid catalytic cracking, optics, and green technologies, as well as its medical applications
  • Lanthanum: Properties and Applications - Stanford Materials
    Lanthanum, a silvery-white rare earth metal, plays a crucial role in various modern technological advancements Its unique properties and applications make it indispensable in numerous industries This article delves into the properties of lanthanum and explores its diverse applications





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