• A silvery-white, malleable, and ductile chemical element whose atomic number is 57. It is chemically active, when in powder form it ignites spontaneously, and has over 30 known isotopes, of which one is stable. Its applications include its use in oxide form to improve the properties of optical glass, as a phosphor, in superconductors, in semiconductors, and in electronic devices such as vacuum tubes. Its chemical symbol is La.
  • chemical symbol La

Not what you were looking for?