|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||138.905|
|State at 20°C||Solid||Key isotopes||139La|
|Electron configuration||[Xe]5d1 6s2||CAS number||7439-91-0|
|ChemSpider ID||22369||ChemSpider is a free chemical structure database.|
- Lanthanum is a chemical element with an atomic number of 57 and represented by the symbol La in the Periodic Table.
- 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.
- 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.
- 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.
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