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Assertion (A) While going from left to right of the periodic table, the atomic size decreases more rapidly for the $3 d$-series compared to the $4 f$-series of elements. Reason (R) $3 d$-electrons experience lesser shielding than $4 f$-electrons.
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Both $(\mathrm{A})$ and $(\mathrm{R})$ are correct and $(\mathrm{R})$ is the correct explanation of (A)
While going from left to right of the periodic
table, the atomic size decreases more rapidly for the $3 d$-series compared to $4 f$-series of elements.
Also, $3 d$-electrons experience lesser shielding than $4 f$-electrons.
Thus, both Assertion (A) and Reason (R) are correct and (R) is the correct explanation of (A).
table, the atomic size decreases more rapidly for the $3 d$-series compared to $4 f$-series of elements.
Also, $3 d$-electrons experience lesser shielding than $4 f$-electrons.
Thus, both Assertion (A) and Reason (R) are correct and (R) is the correct explanation of (A).
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