Composition et stabilité d’un noyaucorrigé des exercices Physique bac2024short

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Dans cette vidéo on va voir une notion très importante en chimie et en structure de l'atome c'est la stabilité des noyaux. • La stabilité d’un noyau est d’autant plus élevée que l’énergie de liaison par nucléon est grande, elle est voisine de 8 MeV/nucléon pour la plupart des noyaux stables. • Le diagramme d'Aston montre bien les atomes stables et nos stable : • La courbe d’Aston montre la variation de E liaison /nucléon(A) en fonction de • nombre A du nucléon. et il illustre trois zones essentielles : • une zone avec un rapport E/A faible • une zone avec un E/A maximal • Une zone avec un E/A moins basse. • Et pour plus d'explication, veuillez voir la vidéo entière et 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