Lanthanum - Wikipedia
WebLanthanum 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 is the first and the prototype.
Lanthanum - Element information, properties and uses | Periodic …
WebElement Lanthanum (La), Group 19, Atomic Number 57, d-block, Mass 138.905. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Lanthanum | Rare Earth Element, Uses in Technology, & Medicine
WebMar 6, 2024 · 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. It is the second most reactive of the rare-earth metals after europium.
Comprehensive Guide to Lanthanum: Uses, Properties, and …
WebLanthanum is a chemical element with the symbol "La" and atomic number 57. It belongs to the lanthanide series and is classified as a rare-earth element. Lanthanum is generally known for its use in high-tech applications like flat …
Facts About Lanthanum | Live Science
WebJun 20, 2013 · Lanthanum oxide (La 2 O 3 ), also called lanthana, improves the alkali resistance of glass and is used in making camera lenses and in other special glasses. About 25 percent of the alloy...
Lanthanum - Minerals Education Coalition
WebDescription. Named from the Greek word meaning “to lie hidden,” lanthanum is a very soft, silvery-white metal–soft enough to cut with a knife. It is very reactive, tarnishing quickly in air and reacting with water to form hydrogen gas. It also reacts with most acids and bases.
Lanthanum Element Facts / Chemistry - chemicool.com
WebLanthanum and its compounds are considered to be moderately toxic. Characteristics: Lanthanum is a silvery-white soft metal, which can be cut with a knife. It is ductile, malleable and exposed surfaces tarnish rapidly in air forming the oxide. Lanthanum reacts with water to form lanthanum hydroxide plus hydrogen gas.
Lanthanum | Encyclopedia.com
WebMay 17, 2018 · Overview. Lanthanum is the third element in Row 6 of the periodic table. The periodic table is a chart that shows how chemical elements are related to each other. Lanthanum is a transition element in Group 3 (IIIB) of the periodic table. Lanthanum's position makes it one of the transition metals.
Lanthanum (La) - Periodic Table
WebLanthanum 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 …
lanthanum summary | Britannica
Weblanthanum, Metallic chemical element, one of the transition elements, chemical symbol La, atomic number 57. It was discovered in 1839, and its name derives from the Greek for “to lie hidden.” Lanthanum is a ductile and malleable silvery …
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