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configuration atome


kirose
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  • Solution

Salut !

 

V (Z=23) -> 3d3 4s2

Fe (Z=26) -> 3d6 4s2

 

On cherche la configuration de Fe3+. Pour créer un cation on enlève des électrons au plus grand n en premier. 

On enlève ici trois électrons au Fe, ce qui nous donne

 

Fe3+ : 3d5 4s0

 

Le Fe3+ comporte le même nombre d'électron que le V (23) mais leurs structures électroniques externes sont différentes.

 

 

Est ce que ça répond à ta question ? 

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