Exercice N°2 :
Le noyau d'un atome d'aluminium possède 13 protons et 27
nucléons.
1- Donn...
Social Studies, 10.03.2021 02:50 Paytonsmommy09
Exercice N°2 :
Le noyau d'un atome d'aluminium possède 13 protons et 27
nucléons.
1- Donner sa représentation symbolique.
2- Donner la composition de cet atome.
3- Donner la structure électronique de cet atome et le nombre
d'électrons sur sa couche externe.
4- Calculer sa masse approchée.
5- Donner le nombre d'atomes d'aluminium contenus dans un
échantillon de masse m= 1,0 g.
Answers: 2
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