1. Quelle est la composition fondamentale d’un atome ?
2. Quelle est la composition du noyau d’un atome ?
3. Comment peut-on différencier deux isotopes d’un même élément ?
Atome — définition ?
Structure fondamentale de la matière.
Atome — composantes principales?
Noyau (protons + neutrons) et électrons en orbite.
Ion — rôle ?
Atome chargé par perte ou gain d’électrons.
Proton — masse et charge?
Masse ≈ 1 u, charge +1 e.
Particules élémentaires — composition ?
Proton, neutron, électron.
Neutron — charge?
Charge nulle, dans le noyau.
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