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Couche de valence


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Posted (edited)

Saluttt 

 

Je m’embrouille tout le temps avec cette histoire de couche de valence

Par exemple pour cette configuration là : 1s22s22p63s23p63d74s2.   On prend que 4s pour la couche de valence ou 3d et 4s parce que du coup si il nous demande le nombre d’électrons ça va pas donner la même chose 

 

Mercii

Edited by lamyae_nucléaire

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