Question

Question 2.64 Among the following pairs of orbitals which orbital will experience the larger effective nuclear charge?

(i) 2s and 3s,

(ii) 4d and 4f,

(iii) 3d and 3p

Class XI Structure of Atom Page 69

Answer 1

concept :- the distance between nucleus and orbital increases, effective nuclear charge decreases .
increasing order of effective nuclear charge
s > p > d > f for same quantum number

(i) 2s and 3s
2s - orbital experience larger effective nuclear charge than 3s - orbital ,because 2s is closer than 3s to the nucleus.

(ii) 4d and 4f
similarly , 4d- orbital experience larger effective nuclear charge than 4f - orbital.

(iii) 3d and 3p
similarly , 3p - orbital experience larger effective nuclear charge than 3d - orbital.

Answer 2

Answer:

1.2s orbital are effective nuclear charge than 3s orbital because 2s is closer than 3s to the nuclears.