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Symbol La
Atomic Number 57
Atomic Mass 138.91 g.mol -1
Discovered by Carl Gustav Mosander in 1839

Chemical Properties of Lanthanum

Group Lanthanides Melting point 920°C, 1688°F, 1193 K
Period 6 Boiling point 3464°C, 6267°F, 3737 K
Block d Density (g cm−3) 6.15
Atomic number 57 Relative atomic mass 138.91
State at 20°C Solid Key isotopes 139La
Electron configuration [Xe]5d6s2 CAS number 7439-91-0
ChemSpider ID 22369 ChemSpider is a free chemical structure database.

What is Lanthanum?

  • Lanthanum is a chemical element with an atomic number of 57 and represented by the symbol La in the Periodic Table.

Uses of Lanthanum

  • The chemical Lanthanum is found in modern television sets, the energy saving lamps, fluorescent tubes, etc.
  • It is used in the field of optics as lenses and radiation absorbing glasses.
  • It is known to increase the resistivity and malleability of steel.
  • It is also used for catalysis in the field of petroleum refineries.
  • It is used in the production of catalyst and also in polishing of glass.

Properties of Lanthanum

  • It is found abundantly in the environment.
  • It appears like a white- silvery metal.
  • This metal is soft in nature and also active and ductile.
  • On reaction with water, this metal oxidizes forming its hydroxide.
  • The salts of Lanthanum are insoluble in water.
  • About 12.000 tonnes of lanthanum is produced worldwide every year.

Certain Health Facts About Lanthanum

  • The main problem with this element is its disposal. By the industrial wastes getting dumped into the water bodies mainly the petroleum producing industry.
  • It produces severe damage to plants and animals and also causes nervous system disorder in humans.
Test your Knowledge on Lanthanum!

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