Lanthanum is the first element and prototype of the lanthanide series. In the periodic table, it appears to the right of the alkaline earth metal barium and to the left of the lanthanide cerium. Lanthanum is generally considered the first of the f-block elements by …

lanthanum (La), chemical element, a rare-earth metal of Group 3 of the periodic table, that is the prototype of the lanthanide series of elements. Lanthanum is a ductile and malleable silvery white metal that is soft enough to be cut with a knife.

Jan 18, 2025 · Lanthanum is a soft, silvery-white metallic element with the symbol La and atomic number 57. It is the first element in the lanthanide series and is a rare earth element. Lanthanum has significant applications in modern technology, ranging from catalysis to …

Element Lanthanum (La), Group 19, Atomic Number 57, d-block, Mass 138.905. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Explore the comprehensive guide on Lanthanum, a rare-earth element with wide-ranging applications. Learn about its history, physical and chemical properties, industrial uses in fluid catalytic cracking, optics, and green technologies, as well as its medical applications.

Lanthanum is a chemical element with symbol La and atomic number 57. Classified as a lanthanide, Lanthanum is a solid at room temperature. [Xe]6s 2 5d 1. J.C. Slater, J Chem Phys, 1964, 41 (10), 3199-3205. DOI:10.1063/1.1725697.

Jun 20, 2013 · Lanthanum is silvery white, malleable, ductile and so soft you can slice it with a knife. It is one of the most reactive rare-earth metals, which are also called lanthanides. The element reacts...

Lanthanum is a whitish silver metal. It is malleable and soft and can be cut with a knife. It is the first member of the lanthanide series of the periodic table, that is comprised of fifteen similar elements. Lanthanum is also the first member of the transition metals of the 6 th period.

The chemical element lanthanum is classed as a lanthanide and rare earth metal. It was discovered in 1839 by Carl G. Mosander. Lanthanum is used in many applications, such as studio lighting, laptop batteries, camera lenses and hybrid car batteries. Silicon nitride grain boundary doped with lanthanum atoms. Image Ref. (6)

Lanthanum is the 57th element in the periodic table and has a symbol of La and atomic number of 57. It has an atomic weight of 138.90547 and a mass number of 139. Lanthanum has fifty-seven protons and eighty-two neutrons in its nucleus, and fifty-seven electrons in six shells.