Lanthanum is a chemical element with the 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 … See more Physical 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 … See more Lanthanum oxide is a white solid that can be prepared by direct reaction of its constituent elements. Due to the large size of the La ion, La2O3 adopts a hexagonal 7-coordinate structure that changes to the 6-coordinate structure of scandium oxide (Sc2O3) and See more The first historical application of lanthanum was in gas lantern mantles. Carl Auer von Welsbach used a mixture of lanthanum oxide See more Lanthanum has no known biological role in humans. The element is very poorly absorbed after oral administration and when injected its elimination is very slow. Lanthanum carbonate (Fosrenol) … See more In 1751, the Swedish mineralogist Axel Fredrik Cronstedt discovered a heavy mineral from the mine at Bastnäs, later named See more Lanthanum is the third-most abundant of all the lanthanides, making up 39 mg/kg of the Earth's crust, behind neodymium at 41.5 mg/kg and cerium at 66.5 mg/kg. It is almost three times as abundant as lead in the Earth's crust. Despite being among the so-called "rare … See more Lanthanum has a low to moderate level of toxicity and should be handled with care. The injection of lanthanum solutions produces See more WebName: Lanthanum Symbol: La Atomic Number: 57 Atomic Mass: 138.9055 amu Melting Point: 920.0 °C (1193.15 K, 1688.0 °F) Boiling Point: 3469.0 °C (3742.15 K, 6276.2 °F) Number of Protons/Electrons: 57 Number of …
Chemical Elements.com - Lanthanum (La)
WebElement Lutetium (Lu), Group 19, Atomic Number 71, f-block, Mass 174.967. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. WebJun 3, 2024 · Chemical Symbol Definition . A chemical symbol is a notation of one or two letters representing a chemical element. The exceptions to the one- to two-letter symbol are the temporary element … says my connection is not private
Chemical Formula Search - NIST
WebLanthanum La CID 23926 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, … WebThe latest release of the Periodic Table (dated 4 May 2024) includes the most recent abridged standard atomic weight values released by the IUPAC Commission on Isotopic Abundances and Atomic Weights (), compiled as part of the 2024 Table of Standard Atomic Weights 2024.For elements that lack isotopes with a characteristic isotopic abundance in … WebTo specify any number (including zero) of given element, use an asterisk (*) after the element symbol. To explicitly specify an ion, place the charge at the end of the formula. If the charge is greater than one the charge should be included after the + or - symbol (e.g., C60-2 ). Examples of chemical formulas (Back to search) says my device added to air printer