[Résolu] Annathèmes, Atomes, ondes... QCM 33

[Mister J]

Hey, c'est encore moi
"Quelle est en eV l'énerdie de l'électron de la couche L du chlore (Z=17) sachant que la constante d'écran correspondante est égalé à 8.08?
A. -27 B.-270 C.-541 D.-982 E.-760 "
Réponse B
Alors que je trouve En=-13,6(17²-8.08²)=-13.6(289-65.3)=-13.6*233.7=-3042=-760
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Je me suis trompé quelque part?

[*Pichu*]

Salut !
Alors oui en fait tu t'es trompé au niveau du carré : la formule c'est W_L=-13,6 x (Z-sigma)²/n²
Donc tu dois faire W_L=-13,6 x (17-8)²/2² W_L=-13,6 x 81/4 W_L=-13,6 x 20 = -270 eV
Réponse B

Voilà juste une erreur de puissance !

[Mister J]

ok merci
ça m'évitera de la refaire