Which of the following is the incorrect match | vedclass

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(B) $(a) \, [Ar] \, 3d^5 \, 4s^1$ corresponds to $Cr$ $(Z=24)$,which is in the $4^{th}$ period and $6^{th}$ group. This is correct.$(b) \, [Kr] \, 4d^

Vedclass · Accepted Answer

$[Kr] \, 4d^{10} 	o 5^{th}$ period,$12^{th}$ group

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(B) $(a) \, [Ar] \, 3d^5 \, 4s^1$ corresponds to $Cr$ $(Z=24)$,which is in the $4^{th}$ period and $6^{th}$ group. This is correct.$(b) \, [Kr] \, 4d^{10}$ corresponds to $Pd$ $(Z=46)$,which is in the $5^{th}$ period and $10^{th}$ group (not $12^{th}$). Wait,$Pd$ is $4d^{10} 5s^0$,group $10$. Actually,let's re-evaluate: $(d) \, [Xe] \, 4f^{14} \, 5d^2 \, 6s^2$ is $Hf$ $(Z=72)$,which is in the $6^{th}$ period and $4^{th}$ group. This is correct.$(c) \, [Rn] \, 6d^2 \, 7s^2$ is $Th$ $(Z=90)$,which is in the $7^{th}$ period and $4^{th}$ group (not $3^{rd}$). However,looking at the options provided,$(b)$ is the most standard incorrect match in textbooks as $Pd$ is group $10$.

Which of the following is the incorrect match for the atom of an element?

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