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Deutsche Lanthan {n} [chem.] Synonyme

chem  
La  (Symbol)  ÂLanthan  ÂLanthanum  

Englische lanthanum Synonyme

 

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Lanthanum is a soft, ductile, silvery-white metallic chemical element with symbol La and atomic number 57. It tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. 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. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. The usual oxidation state is +3. Lanthanum has no biological role and is not very toxic.

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