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Continue to ChatCe reprezinta in fizica si in chimie "un element"? https://epedia.ro/2014/11/10/ce-reprezinta-in-fizica-si-in-chimie-un-element/
Ce reprezinta in fizica si in chimie "un element"? https://epedia.ro/2014/11/10/ce-reprezinta-in-fizica-si-in-chimie-un-element/