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The D-And-f-Block Elements
How would you account for the irregular variation of ionisation enthalpies (first and second) in the first series of the transition elements?
Ionization enthalpies are found to increase in the given series due to a continuous filling of the inner d-orbitals. The irregular variations of ionization enthalpies can be attributed to the extra stability of configurations such as d0, d5, d10. Since these states are exceptionally stable, their ionization enthalpies are very high.
Some More Questions From The d-And-f-Block Elements Chapter
Explain why Cu+ ion is not stable in aqueous solutions?
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?
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Mock Test Series
Mock Test Series