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For the first row transition metals the ...

For the first row transition metals the `E^(ɵ)` value are:
`{:(underset(-1.18)(V),,underset(-0.91)(Cr),,underset(-1.18)(Mn),,underset(-0.44)(Fe),,underset(-0.28)(Co),,underset(-0.25)(Ni),underset(+0.34)(Cu)):}`
Explain the irregularity in the above values.

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The correct Answer is:
The `E^(Theta)(M^(2+//M))` Value are not regular which can be explained from the irregular variation of ionisation enthalpies (Delta_(1)H_(1)+Delta_(1)H_(2))` and also the sublimation enthalpies which are relatively much less for manganese and vanadium.
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  18. Compare the chemistry of actinoids with that of the lanthanoids with s...

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