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Résumé Synthèse : Bases des atomes

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Synthèse sur les informations de bases sur les atomes

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Noyeau atomique : Protons
Formé par des nucléons
neutrons
Protons : P+, masse relative : 1, charge électronique relative : +1
neutrons : N°, masse relative : 1, charge électronique relative : 0
NOMBRE DE NUCLéons : nombre de masse A
NOMBRE DE Protons: numéro atomique Z
NOMBRE DE Neutrons: nombre de masse A - numéro atomique Z
L’atome est neutre !!!!

Nuage électronique :
Formé par des électrons qui gravitent autour du noyeau.
électrons : E-, masse relative : 0, charge électronique relative : -1
électrons
protons
noyeau (nucléons)
neutrons
orbite

Démocrite Dalton Thomson Rutherford Bohr Chadwick




400 ACN 1810 1897 1911 1922 1932
Particules Sphères remplies Noyeau positif Pareil rutherford Présence de
Sphères autour gravitent mais les électrons neutrons neutres.
invisibles de positif avec
indéstructibles électrons
“Atomos” des particules de ont des orbites Noyeau entouré
négatifs. Reste
négatif bien présices d’électrons.
atome vide

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