NEETChemistryClassification of Elements and Periodicity in Properties
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. The correct answer is
Options
- ABoth ( A ) and ( R ) are correct and ( R ) is the correct explanation of (A)
- BBoth (A) and (R) are correct, but (R) is not the correct explanation of ( A )
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
A. Both ( A ) and ( R ) are correct and ( R ) is the correct explanation of (A)
Step-by-step solution
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).