Question

2. 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:

a. 4f, 3d, and 3s respectively

b. 2s, 4d and 3p respectively

c. 2s, 4d and 3d respectively

d. 4d, 3p and 2s respectively​

Answer 1

Answer: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.

Explanation: