lantano 41
Chemical element of the group known as "rare earths" with the symbol La . Its name is of Greek origin, by 955; 945; 957; 952; 945; 957; 949; 953; 957; (lanthanein "hidden") , as its discoverer, the Swedish chemist Carl Gustaf Mosander, found it in an impure cerium nitrate, where he did not expect to find it.
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