Lanthanum, curiye 57 ee shaxda xilliyeedka. Si shaxda xilliyeedka ee curiyeyaasha u ekaado mid is-waafaqsan, dadku waxay soo saareen 15 nooc oo canaasiir ah, oo uu ku jiro lanthanum, kuwaas oo nambarkooda atomiga uu markooda kordho, waxayna si gooni ah u hoos geeyeen shaxda xilliyeedka. Sifooyinkooda kiimikaad waa si...
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