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lanthanum

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 first and the prototype of the lanthanide series, a group of 15??similar elements between lanthanum and lutetium in the periodic table. Lanthanum is traditionally counted among the rare-earth elements. Like most other rare-earth elements, its usual oxidation state is +3, although some compounds are known with an oxidation state of +2. Lanthanum has no biological role in humans but is used by some bacteria. It is not particularly toxic to humans but does show some antimicrobial activity.

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Strings (4)

  • str_k__gdb_alternateName
    str.gdb:alternateName
    element 57|metallic lanthanum
  • str_k__gdb_atomicSymbol
    str.gdb:atomicSymbol
    La
  • str_k__gdb_image
    str.gdb:image
    Lanthan 1-cropflipped.jpg
  • str_k__rdfs_comment
    str.rdfs:comment
    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 first and the prototype of the lanthanide series, a group of 15??similar elements between lanthanum and lutetium in the periodic table. Lanthanum is traditionally counted among the rare-earth elements. Like most other rare-earth elements, its usual oxidation state is +3, although some compounds are known with an oxidation state of +2. Lanthanum has no biological role in humans but is used by some bacteria. It is not particularly toxic to humans but does show some antimicrobial activity.

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