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Rayonnement ionisant - Français

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Le noyau de l’atomeNombre de masse# nucléons : p + nNombre atomique# protons (ou e - )A XZélémentN = A – Z# neutronsZ = 1 H hydrogèneZ = 6 C carboneZ = 92 U uraniumEvelyne Daubie Service Phys. générale & Phys. des Particules UMH 5

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