In any atom,which sub-shell will have the hig | vedclass

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(B) To determine the energy of a sub-shell,we use the $(n + l)$ rule.For $3p$: $n = 3, l = 1$,so $(n + l) = 3 + 1 = 4$.For $3d$: $n = 3, l = 2$,so $(n

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$3d$

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(B) To determine the energy of a sub-shell,we use the $(n + l)$ rule.For $3p$: $n = 3, l = 1$,so $(n + l) = 3 + 1 = 4$.For $3d$: $n = 3, l = 2$,so $(n + l) = 3 + 2 = 5$.For $4s$: $n = 4, l = 0$,so $(n + l) = 4 + 0 = 4$.For $3s$: $n = 3, l = 0$,so $(n + l) = 3 + 0 = 3$.Comparing the $(n + l)$ values,$3d$ has the highest value of $5$,therefore it has the highest energy.

In any atom,which sub-shell will have the highest energy among the following?

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