According to the Aufbau principle,which of th | vedclass

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(C) According to the Aufbau principle,electrons fill orbitals in the order of increasing energy,which is determined by the $(n + l)$ rule.For $5s$: $n

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$5s$

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(C) According to the Aufbau principle,electrons fill orbitals in the order of increasing energy,which is determined by the $(n + l)$ rule.For $5s$: $n = 5, l = 0$,so $(n + l) = 5 + 0 = 5$.For $4d$: $n = 4, l = 2$,so $(n + l) = 4 + 2 = 6$.For $5p$: $n = 5, l = 1$,so $(n + l) = 5 + 1 = 6$.Since $5s$ has the lowest $(n + l)$ value,it has the lowest energy and will be filled first. The increasing order of energy is $5s < 4d < 5p$.

According to the Aufbau principle,which of the three $4d$,$5p$,and $5s$ will be filled with electrons first?

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