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Question
A very slight decrease in atomic radius occurs in a transition series when compared with that in a representative series. This is due to :
A very slight decrease in atomic radius occurs in a transition series when compared with that in a representative series. This is due to :
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Solution
The correct option is A shielding effect
Due to the poor shielding effect of d-electrons, the outer electrons experience a more effective nuclear charge. Due to a greater effective nuclear charge, their size contracts slightly and thus, there is less variation among the size of transition elements.
Due to the poor shielding effect of d-electrons, the outer electrons experience a more effective nuclear charge. Due to a greater effective nuclear charge, their size contracts slightly and thus, there is less variation among the size of transition elements.
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