(C) The $5d$ series consists of elements from $Lanthanum$ ($La$,$Z=57$) and $Hafnium$ ($Hf$,$Z=72$) to $Mercury$ ($Hg$,$Z=80$). The statement that it

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$5d$ series consists of all elements from lanthanum to mercury of the periodic table.

(C) The $5d$ series consists of elements from $Lanthanum$ ($La$,$Z=57$) and $Hafnium$ ($Hf$,$Z=72$) to $Mercury$ ($Hg$,$Z=80$). The statement that it consists of all elements from $La$ to $Hg$ is incorrect because the $4f$ series (lanthanoids) intervenes between $La$ and $Hf$.

Class 12 Chemistry The d- and f-Block Elements General Characteristics

Medium

Which of the following statements regarding transition elements is $NOT$ $CORRECT$?

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A
These exhibit properties between $s$ and $p$ block elements.
B
These form cations with incomplete $d$-subshell.
C
$5d$ series consists of all elements from lanthanum to mercury of the periodic table.
D
These are arranged in four different $d$ series.