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The d-And-f-Block Elements
Question
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What is the reason for the decreasing tendency to form divalent cation across the series as indicated by the decreasing E°M2+ /M values?

Answer

The decreasing values of E° for M2+/M indicates that the tendency to form divalent cation decreases across the series because the sum of the first and the second ionisation enthalpies increases across the series.

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Some More Questions From The d-And-f-Block Elements Chapter

Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

On what ground can you say that scandium (Z = 21) is a transition element but zinc (Z = 30) is not?

The outer electronic configuration of copper is 3d10 4s1, yet it is considered transition element. Why?

Why the melting points of transition elements are high?

Why Zn, Cd and Hg are not regarded as transition elements?

Name the first element of 3rd transition series.

Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

Why are transition elements so named?

Why are transition elements known as d-block elements?

Write the general electronic configuration of d-block elements.