Thursday 20 December 2012

Lanthanum=اللانثانم


Lanthanum=اللانثانم
اللنثانوم عنصر فلزي
WIKIPEDIA


Lanthanum
 La
 Greek
 λανθάνειν (lanthanein)
 to lie hidden
From Greek lanthanein, "to lie (hidden)".


Lanthanum is a chemical element with the symbol La and atomic number 57
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