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les electrons trouvent ___ du noyau d'un atome autour
le nombre d'electrons egale la nombre de protons
on nomme ces couches d'orbites les niveaux d'energie
les autres niveaux veulent un maximum de 8 electrons
quand les couches ont 8 electrons ils font un octet stable
les electrons bougent a une vitesse dde 1300km/h
electrons avec moins d'energie ont trouvees plus ___ de noyau proche
protons ont un charge positive
neutrons ont un charge negative
les electrons plus loins du noyau sont nomme des electrons de valence/ electrons peripheriques.
les elements reagissent avec des autres elements pour faire des composees
quand un atome perde ou gagne les atomes, on le nomme un ion
si un ion perd un electron il est positive
si un ion gagne un electron il est negative
Created by: pickle131