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Société, moeurs, religion, histoire des idées, mythologie - CRPE / ESPE - 20 QCM - Difficulté : ★★

Questionnaire de géographie - Catégorie : CRPE / ESPE - 17 QCM - Difficulté : ⭐⭐

Beaux-arts et musique (4) - 20 QCM - Difficulté : ★★

Langue française (1) - Professeurs des écoles - 19 QCM - Difficulté : ⭐

Sciences et techniques - 20 QCM - Difficulté : ★

Sports, loisirs, communication, chanson, divers - 20 QCM - Difficulté : ⭐

Lexique : Connaître la formation des mots - Catégorie : Français - 3 QCM - Difficulté : ★

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LE TISSU GRAISSEUX - 5 QCM - Difficulté : ⭐⭐⭐

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Révision thématique: La FRANCE - 4 - 25 QCM - Difficulté : ★★

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Socle commun : QCM d'actualité (1) - Archive 2012 - 20 QCM - Difficulté : ★★

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Publié le 27/04/2013

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Error (419132): Unterminated string Error (419135): Dictionary key must be a name object Error (419135): Dictionary key must be a name object Error (419137): Dictionary key must be a name object Error (419137): Dictionary key must be a name object Error (419137): Dictionary key must be a name object Error (419138): Dictionary key must be a name object Error (419138): Dictionary key must be a name object Error (419143): Dictionary key must be a name object Error (419145): Dictionary key must be a name object Error (419145): Dictionary key must be a name object Error (419147): Dictionary key must be a name object Error (419147): Dictionary key must be a name object Error (419150): Dictionary key must be a name object Error (419150): Dictionary key must be a name object Error (419152): Dictionary key must be a name object Error (419152): Dictionary key must be a name object Error (419154): Dictionary key must be a name object Error (419154): Illegal character ')' Error (419154): 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must be a name object Error (419275): Dictionary key must be a name object Error (419275): Dictionary key must be a name object Error (419275): Dictionary key must be a name object Error (419277): Dictionary key must be a name object Error (419277): Dictionary key must be a name object Error (419277): Dictionary key must be a name object Error (419277): Dictionary key must be a name object Error (419277): Dictionary key must be a name object Error (419277): Illegal character ')' Error (419277): Dictionary key must be a name object Error (419277): Dictionary key must be a name object Error (419305): Unterminated string Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419305): Illegal character ')' Error (419305): Dictionary key must be a name object Error (419305): Dictionary key must be a name object Error (419309): Unterminated string Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419309): Dictionary key must be a name object Error (419311): Dictionary key must be a name object Error (419311): Dictionary key must be a name object Error (419311): Dictionary key must be a name object Error (419311): Dictionary key must be a name object Error (419311): Dictionary key must be a name object Error (419311): Illegal character ')' Error (419311): Dictionary key must be a name object Error (419311): Dictionary key must be a name object Error (419314): Unterminated string Error (419314): Dictionary key must be a name object Error (419314): Dictionary key must be a name object Error (419314): Dictionary key must be a name object Error (419314): Dictionary key must be a 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must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419326): Dictionary key must be a name object Error (419329): Dictionary key must be a name object Error (419329): Dictionary key must be a name object Error (419329): Dictionary key must be a name object Error (419329): Dictionary key must be a name object Error (419329): Dictionary key must be a name object Error (419329): Illegal character ')' Error (419329): Dictionary key must be a name object Error (419329): Dictionary key must be a name object Error (419336): Unterminated string Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419336): Dictionary key must be a name object Error (419338): Dictionary key must be a name object Error (419338): Dictionary key must be a name object Error (419338): Dictionary key must be a name object Error (419338): Dictionary key must be a name object Error (419338): Dictionary key must be a name object Error (419338): Illegal character ')' Error (419338): Dictionary key must be a name object Error (419338): Dictionary key must be a name object Error (419342): Unterminated string Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419342): Dictionary key must be a name object Error (419344): Dictionary key must be a name object Error (419344): Dictionary key must be a name object Error (419344): Dictionary key must be a name object Error (419344): Dictionary key must be a name object Error (419344): Dictionary key must be a name object Error (419344): Illegal character ')' Error (419344): Dictionary key must be a name object Error (419344): Dictionary key must be a name object Error (419348): Unterminated string Error (419348): Dictionary key must be a name object Error (419348): Dictionary key must be a name obje...

« Définition : On appelle particule élémentaire toute particule indivisible (cette notion est évidemment liée à l'état des connaissances actuelles).

Les protons, les neutrons et les électrons sont des particules élémentaires.

Charge élémentaire : La charge élémentaire est la plus petite charge électrique susceptible d’exister de façon stable.

Sa valeur est e=1,60× 10 −19 C .

Remarque : Toute charge électrique q est égale à un multiple de la charge élémentaire.

q=n×e avec n entier 2.

Particules constituant l’atome L'atome est constitué à partir de 3 particules élémentaires : le proton , le neutron et l'électron .

Autour du noyau formé de neutrons et de protons, les électrons sont en mouvement rapide.

Caractéristiques des particules élémentaires dans l'atome Proton mp = 1,673x10 - 27 kg q = +e r = 1,2x10 - 15 m Neutron mn = 1,675x10 - 27kg q = 0 r = 1,2x10 - 15m Électron me = 9,109x10 - 31 kg q = -e Les ordres de grandeur des masses des particules élémentaires sont: 10 - 27kg pour un nucléon.

10 - 30kg pour un électron.

Le noyau d’un atome est représenté symboliquement par la notation : Z A X avec { X: symbole de l'élément chimique Z: numéro atomique (représente le nombre de protons) A: nombre de masse (représente le nombre de nucléons) Remarque : L’atome est une entité électriquement neutre.

Le nuage électronique est donc chargé négativement et compte autant d’électrons qu’il y a de protons dans le noyau.

La charge du noyau est q N =+Z×e.

La charge portée par les électrons est q e =−Z×e.

Exemple : Soit l’atome de carbone dont le noyau est noté 6 14 C .. »

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