1.

Alltransitionelement ared- block elementbut all d- blockelementare nottransition elements Explain.

Answer» <html><body><p></p>Solution :Elementin whichthe last electron <a href="https://interviewquestions.tuteehub.com/tag/enters-972302" style="font-weight:bold;" target="_blank" title="Click to know more about ENTERS">ENTERS</a> any one of the five d- orbitalsof theirrespec tive penultimateshells arecalledd-blockelements. Inthe light of thisdefinition Zn ,<a href="https://interviewquestions.tuteehub.com/tag/cd-407381" style="font-weight:bold;" target="_blank" title="Click to know more about CD">CD</a>,Hg and <a href="https://interviewquestions.tuteehub.com/tag/cn-907325" style="font-weight:bold;" target="_blank" title="Click to know more about CN">CN</a> cannot beregarded asd- blockelementsincelast electron inthementersthe s-orbital of their respective ultimate shells ratherthan the d- orbital oftheir respectivepenultimate shells . thereforethese elementshouldberegardedas s- <a href="https://interviewquestions.tuteehub.com/tag/blockelement-2476257" style="font-weight:bold;" target="_blank" title="Click to know more about BLOCKELEMENT">BLOCKELEMENT</a>.Butthe propertiesof theseelementresemblemore the d-blockratherthan s- blockelement( referto <a href="https://interviewquestions.tuteehub.com/tag/ans-363318" style="font-weight:bold;" target="_blank" title="Click to know more about ANS">ANS</a> to Q.1 page `3//61`) . Thereforeto makethe studyof periodicclassification ofelementmorerationalthey arestudied along withd-blockelement. Thuson thebasisof properties alltransitionelementare d-blockelementbut on thebasisof electronicconfigurationall d-blockelementare not a transitionelements</body></html>


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