Noyau = Nucléons (Protons + Neutrons).
1. Quelle particule du noyau porte une charge électrique positive ?
2. Quelle est la composition principale du noyau d’un atome en termes de nucléons ?
3. Quel ensemble constitue les nucléons d’un atome ?
Nucléons — définition ?
Particules du noyau, protons et neutrons.
Nucléons rôle
Protons et neutrons, composants du noyau
Charge de l’électron — valeur ?
-e-, charge négative élémentaire.
Charge du proton
+e+ (positive)
Charge du neutron
Nulle, neutre électriquement
Charge de l’électron
-e- (négative)
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