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Principe d'exclusion de Pauli : Deux électrons d'un même atome ne peuvent avoir leurs quatre nombres quantiques identiques (maximum deux électrons par orbitale avec des spins opposés). chimie generale cours et exercices corriges pdf upd
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| | Core Topic | Key Concepts & Skills | | :--- | :--- | :--- | | 1 | Généralités (Atom) | Atomic structure (Z, A), isotopes, the mole, Avogadro's number. | | 2 | Radioactivité | Nuclear decay (Soddy's laws), activity (Becquerel), energy release (E=mc²). | | 3 & Fiche 1-2 | Configuration Électronique | Aufbau, Pauli, Hund rules; Klechkowski rule; energy levels (n, l, m, s); writing e⁻ configurations. | | 4 & Fiche 3 | Liaison Chimique | Covalent, ionic, metallic bonds; Lewis structures; octet rule; electronegativity; VSEPR theory. | | Fiches 12-14 | Acides et Bases | pH scale; acid/base definitions (Brønsted-Lowry); neutralization; acid-base titrations. | | Fiches 15-17 | Oxydoréduction | Half-reactions; oxidation states; redox titrations; electrochemical cells. | | Fiches 27-30 | Cinétique Chimique | Reaction rates; rate laws; reaction mechanisms; catalysis; activation energy. | search results have provided a variety of potential
Noyau, protons, neutrons, électrons et isotopes.
En appliquant la règle de Klechkowski, nous remplissons les sous-couches dans l'ordre des énergies croissantes jusqu'à obtenir 16 électrons : 1s21 s squared (2 électrons) 2s22p62 s squared 2 p to the sixth power (8 électrons) 3s23p43 s squared 3 p to the fourth power (6 électrons) Configuration complète :