Definition of Lanthanum. Meaning of Lanthanum. Synonyms of Lanthanum

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Definition of Lanthanum

Lanthanum
Lanthanum Lan"tha*num, n. [NL., fr. Gr. ? to lie hid, to be concealed.] (Chem.) A rare element of the group of the earth metals, allied to aluminium. It occurs in certain rare minerals, as cerite, gadolinite, orthite, etc., and was so named from the difficulty of separating it from cerium, didymium, and other rare elements with which it is usually associated. Atomic weight 138.5. Symbol La. [Formerly written also lanthanium.]

Meaning of Lanthanum from wikipedia

- 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...
- Lanthanum(III) oxide, also known as lanthana, chemical formula La2O3, is an inorganic compound containing the rare earth element lanthanum and oxygen....
- Lanthanum decahydride is a polyhydride or superhydride compound of lanthanum and hydrogen (LaH10) that has shown evidence of being a high-temperature superconductor...
- Lanthanum iodide may refer to: Lanthanum diiodide, LaI2 Lanthanum(III) iodide (lanthanum triiodide), LaI3 This set index article lists chemical compounds...
- study the matter agree that it starts at lanthanum in accordance with the Aufbau principle. Even though lanthanum does not itself fill the 4f subs**** as...
- Naturally occurring lanthanum (57La) is composed of one stable (139La) and one radioactive (138La) isotope, with the stable isotope, 139La, being the...
- Lanthanum hexaboride (LaB6, also called lanthanum boride and LaB) is an inorganic chemical, a boride of lanthanum. It is a refractory ceramic material...
- 499°C to lanthanum oxide, nitric oxide and oxygen. Lanthanum nitrate is prepared by reacting lanthanum oxide with nitric acid which creates lanthanum(III)...
- least the 14 metallic chemical elements with atomic numbers 57–70, from lanthanum through ytterbium. In the periodic table, they fill the 4f orbitals. Lutetium...
- Lanthanum chloride is the inorganic compound with the formula LaCl3. It is a common salt of lanthanum which is mainly used in research. It is a white...