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(D) The ionic size of trivalent ions generally increases down a group due to the addition of new shells. $Ti^{3+}$ belongs to the $3d$ series,$Zr^{3+}

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$La^{3+}$

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(D) The ionic size of trivalent ions generally increases down a group due to the addition of new shells. $Ti^{3+}$ belongs to the $3d$ series,$Zr^{3+}$ to the $4d$ series,and $Hf^{3+}$ to the $5d$ series. $La^{3+}$ is a lanthanide ion with a larger atomic radius compared to the transition metal ions listed. Among the given options,$La^{3+}$ has the largest ionic radius due to its position in the $6th$ period and the lanthanide contraction effect being less pronounced for $La^{3+}$ compared to the subsequent $Hf^{3+}$ ion.

$E^{\Theta }$	$V$	$Cr$	$Mn$	$Fe$	$Co$	$Ni$	$Cu$
$(M^{2+}/M)$	$-1.18$	$-0.91$	$-1.18$	$-0.44$	$-0.28$	$-0.25$	$+0.35$

The trivalent ion having the largest size among the following is:

Similar Questions

Lanthanoid contraction is responsible for which of the following?

An element is in $M^{3+}$ form. Its electronic configuration is $[Ar]3d^1$. The ion is:

For the first row transition metals,the $E^{\Theta }$ values are:

$E^{\Theta }$ $V$ $Cr$ $Mn$ $Fe$ $Co$ $Ni$ $Cu$

$(M^{2+}/M)$ $-1.18$ $-0.91$ $-1.18$ $-0.44$ $-0.28$ $-0.25$ $+0.35$

Explain the irregularity in the above values.

The calculated magnetic moment (in Bohr magnetons) of $Cu^{2+}$ ion is:

The transition metals are mostly

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