For the first row transition metals the {E^Th | vedclass

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The ${E^\Theta }\,\left( {{M^{2 + }}/M} \right)$ values are not regular which can be explained from the irregular variation of ionisation en

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The ${E^\Theta }\,\left( {{M^{2 + }}/M} \right)$ values are not regular which can be explained from the irregular variation of ionisation enthalpies $\left(\Delta_{1} H_{1}+\Delta_{1} H_{2}\right)$ and also the sublimation enthalpies which are relatively much less for manganese and vanadium.

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

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

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

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

Explain the irregularity in the above values.

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For the first row transition metals the ${E^\Theta }$ values are: ${E^\Theta }$ $V$ $Cr$ $Mn$ $Fe$ $Co$ $Ni$ $Cu$ $\left( {{M^{2 + }}/M} \right)$ $-1.18$ $-0.91$ $-1.18$ $-0.44$ $-0.28$ $-0.25$ $+0.35$ Explain the irregularity in the above values.