Lanthanum element (La) is in period 6 of a periodic table. Lanthanum is in the d-block and it is classified as a lanthanide on the periodic table.
There is a lot more information related to lanthanum which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Lanthanum element (Information Table)
- Lanthanum element in Periodic table
- Facts about Lanthanum
- Properties of Lanthanum
- Uses of Lanthanum
Lanthanum Element (Information Table)
The important data related to lanthanum element is given in the table below.
|Appearance of lanthanum||Silvery white metallic appearance|
|Atomic number of lanthanum||57|
|Symbol of lanthanum||La|
|Atomic mass of lanthanum||138.91 u|
|Protons, Neutrons & Electrons in lanthanum||Protons: 57, Neutrons: 82, Electrons: 57|
|State of lanthanum (at STP)||Solid|
|Period number of lanthanum in periodic table||6|
|Block of lanthanum in periodic table||d-block|
|Category of lanthanum||Lanthanides|
|Bohr model or Electrons per shell or Electrons arrangement in lanthanum||2, 8, 18, 18, 9, 2|
|Electron configuration of lanthanum||[Xe] 5d1 6s2|
|Orbital diagram of lanthanum|
|Electronegativity of lanthanum (on pauling scale)||1.1|
|Atomic radius of lanthanum (van der Waals radius)||240 picometers|
|Density of lanthanum||6.15 g/cm3|
|1st ionization energy of lanthanum||5.577 eV|
|Main isotope of lanthanum||139La|
|Melting point of lanthanum||1193 K or 920 °C or 1688 °F|
|Boiling point of lanthanum||3737 K or 3464 °C or 6267 °F|
|Crystal structure of lanthanum||Double Hexagonal Close Packed (DHCP)|
|Discovery of lanthanum||By Carl Gustaf Mosander in 1838|
Also see: Interactive Periodic Table (It has rotating bohr models as well as many other details of all the 118 elements in a single periodic table).
Lanthanum element in Periodic table
The Lanthanum element (La) has the atomic number 57 and is located in period 6. Lanthanum is a metal and it is classified as a lanthanide group element.
Click on above elements in the periodic table to see their information.
Facts about lanthanum
Here are a few interesting facts about the lanthanum element.
- Lanthanum was given its name from a Greek word “lanthano”, which means “to be hidden”.
- The concentration of lanthanum in the earth’s crust is around 32 ppm.
- The annual production of lanthanum in the entire world is around 12500 tons.
- The leading producers of lanthanum are China, Russia and Malaysia.
- Lanthanum is the most reactive rare earth element on the periodic table.
Properties of lanthanum
Here is a list of some physical properties and chemical properties of lanthanum.
Physical properties of lanthanum
- Lanthanum has a silvery white metallic appearance.
- Lanthanum is a malleable as well as ductile which means that it can be drawn into thin sheets and wires.
- Lanthanum is a soft metal. It can also be cut with a knife.
- Lanthanum has a DHCP (double hexagonal close packed) crystal structure.
- The melting point and boiling point of lanthanum is 1193 K and 3737 K respectively.
Chemical properties of lanthanum
- Lanthanum reacts with water at room temperature.
- Lanthanum also shows chemical reactions with boron, carbon, nitrogen as well as halogens (fluorine, chlorine, bromine, etc).
- Lanthanum also reacts with oxygen in the air and it tarnishes slowly.
- Lanthanum has an electronegativity of 1.1 on the pauling scale.
Uses of lanthanum
Here are some uses of the lanthanum element.
- Lanthanum oxide is used in manufacturing of night vision glasses as well as some camera lenses.
- The rechargeable batteries of hybrid automobiles also use lanthanum.
- Lanthanum is also used in carbon arc lighting used in studio lightings.
- Lanthanum is also used in manufacturing of nodular cast iron.
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- Periodic Table of Elements: Los Alamos National Laboratory. (n.d.). Periodic Table of Elements: Los Alamos National Laboratory. https://periodic.lanl.gov/57.shtml
- Atomic Data for Lanthanum (La). (n.d.). Atomic Data for Lanthanum (La). https://physics.nist.gov/PhysRefData/Handbook/Tables/lanthanumtable1.htm
- Holden, et al. (2018, December 1). IUPAC Periodic Table of the Elements and Isotopes (IPTEI) for the Education Community (IUPAC Technical Report). Pure and Applied Chemistry, 90(12), 1833–2092. https://doi.org/10.1515/pac-2015-0703
- Zhang, et al. (2011, January 11). Corrected Values for Boiling Points and Enthalpies of Vaporization of Elements in Handbooks. Journal of Chemical & Engineering Data, 56(2), 328–337. https://doi.org/10.1021/je1011086
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