• Name: Lanthanum

  • Symbol: La

  • Number of Energy Levels: 6

  • Electrons on the outer energy level: 2

  • Atomic Number: 57

  • Atomic Mass: 138.9055 Amu

  • Protons / Electrons: 57

  • Neutrons: 82

  • Density: 6.7 g/cm3

  • Classification: Rare Earth

Top 16 interesting facts about Lanthanum

  • Lanthanum was discovered in 1839 by Carl Mosander. Its name derives from the Greek word "lanthaneis" which means "to lie hidden".
  • Lanthanum's melting point is at 920.0 C (1193.15 K, 1688.0 F) and its boiling point is at 3469.0 C (3742.15 K, 6276.2 F).
  • Lanthanum is a silvery white metal.
  • Lanthanum is soft, malleable and ductile metal.
  • Lanthanum oxidizes fast in the presence of air.
  • Lanthanum reacts with water.
  • Lanthanum reacts with all halogens.
  • Lanthanum is found in some rare minerals (monazite and bastnasite) in combination with other rare metals.
  • Lanthanum has only one stable isotope, 139-La.
  • Lanthanum is part of Rare Earth Metals group but it is not a rare element on Earth.
  • Lanthanum is used in nickel-metal hybrid batteries.
  • Lanthanum is also used in hydrogen sponge alloys in energy conservation systems.
  • Lanthanum is used in lighter flints.
  • Lanthanum is used in vacuum tubes, fiber-optic communication systems, carbon arc lamps for studio lightning, special lenses, welding electrodes, radiometric dating for estimating the age of rocks etc.
  • In medicine Lanthanum is used to absorb phosphate in case of end-stage renal failure.
  • Lanthanum does not have any known biological role.