Lanthanum is a chemical element; it has symbol La and atomic number 57. It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum

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

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.

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.

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]. Its main isotopes include the most abundant 139 La (with 99.91% natural abundance) and the most stable 138 La, the radioactive isotope with a half-life period of 1.06 X 10 26 years ...

Lanthanum is a chemically reactive metal and is the most reactive element in the lanthanide series. It readily oxides when exposed to air to form an oxide and is slowly tarnished to lose its silvery appearance.

2021年10月14日 · Lanthanum is a silvery white metallic element that belongs to period 6 of the lanthanoids family, with phosphate binding property. Lanthanum, when administered in a salt form, dissociates in acid to release lanthanum ions, which then bind dietary phosphate.

2023年6月23日 · Lanthanum is a chemical element with the atomic number 57 and is represented by the symbol ‘La’ in the periodic table. It is soft and silvery in appearance and classified as rare earth metal and belongs to the d-block of the lanthanide group of the periodic table. It is a highly reactive rare earth metal only behind europium.

2013年6月20日 · 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...

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 has significant applications in modern technology, ranging from catalysis to advanced optical materials.