d-and f-Block Elements — Chemistry STD 12 Science — Question
Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryd-and f-Block Elements1 Mark
Question
Any transition series contains only ten elements, why?
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Answer
It is because there are only 10 members since in the period left to right atomic number increases and hence after a certain number when the d subshell is fully filled the electron has to go in the s and p-subshell and hence it (d-block) ends up with only 10 elements.
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