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CHEMISTRY · Subjective · CBSE · Chemistry · Classification of Elements and Periodicity in Properties · Classification of Elements and Periodicity in Properties

Problem

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(a) Inert gas elements<br>(b) Representative elements<br>(c) Transition elements<br>(d) Inner transition elements(p) ns1−2ns^{1-2} to ns2np5ns^2np^5<br>(q) 1s21s^2 and ns2np6ns^2np^6<br>(r) (n−2)f1−14(n−1)d1 or 0ns2(n-2)f^{1-14}(n-1)d^{1\text{ or }0}ns^2<br>(s) (n−1)d1−10ns1 or 2(n-1)d^{1-10}ns^{1\text{ or }2}

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