Lanthanum is a chemical element with the symbol La and the atomic number 57. It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air. It is the eponym of the …

2025年1月18日 · 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 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 …

Lanthanum is added to glass used in some camera lenses to improve the clarity of the images it can produce. The flames in the background reflect the ease with which the element burns …

Lanthanum (pronunciation: LAN-the-nem) [3] is a soft, silvery rare-earth metal belonging to the lanthanoids family and represented by the chemical symbol La [1, 2].

The symbol of lanthanum is La. Lanthanum is not a rare metal. It is ranked as the twenty-eighth most abundant metal in the earth’s crust and is thrice (39 mg/kg of the earth’s crust) as …

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 …

Name: lanthanum; Symbol: La; Atomic number: 57 ; Relative atomic mass (A r): 138.90547 (7) g [see note g] Standard state: solid at 298 K; Appearance: silvery white; Classification: Metallic

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 …

Lanthanum is a chemical element of the periodic table with chemical symbol La and atomic number 57 with an atomic weight of 138.905 u and is classed as lanthanide and is part of …