The order of screening effect of electrons of s, p, d and f orbitals of a given shell of an atom on electrons in its outer shell is :

1. s > p > d > f

2. f > d > p > s

3. p < d < f < s

4. f > p > s > d

Subtopic:  Screening Effect |
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Assertion (A):  The shielding effect increase as we go down the group.
Reason (R):  More is the number of electrons in the penultimate shell, and more is shielding.
 
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Screening Effect |
 65%
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