Select the incorrect statement about lanthani | vedclass

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(D) $1$. Lanthanides are elements from $Z = 57$ to $71$. $2$. All lanthanides are non-radioactive except Promethium $(Pm)$,which is radioactive. So,st

Vedclass · Accepted Answer

Lanthanum has $[Xe] 4f^1 6s^2$ configuration.

Vedclass · Answer

(D) $1$. Lanthanides are elements from $Z = 57$ to $71$. $2$. All lanthanides are non-radioactive except Promethium $(Pm)$,which is radioactive. So,statement $A$ is correct. $3$. All lanthanides have a $6s^2$ configuration in their outermost shell. So,statement $B$ is correct. $4$. The most common and stable oxidation state for all lanthanides is $+3$. So,statement $C$ is correct. $5$. Lanthanum $(La, Z = 57)$ has the electronic configuration $[Xe] 5d^1 6s^2$. It does not have any electrons in the $4f$ orbital. Therefore,the statement that Lanthanum has $[Xe] 4f^1 6s^2$ is incorrect.

Select the incorrect statement about lanthanides.

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