What is the general electronic configuration for 2nd row transition series?

Question

What is the general electronic configuration for 2nd row transition series? (A) [N e] 3 d1-10, 4 s2 (B) [A r] 3 d1-10, 4 s1-2 (C) [K r] 4 d1-10, 5 s1-2 (D) [X e] 5 d1-10, 5 s1-2

Tardigrade Admin · Accepted Answer

Transition elements have three series 3 d , 4 d and 5 d. 3 d series has elements 21( Sc ) to 30( Zn ) atomic number. 4 d series has elements 39(Y) to 48(C d) atomic number. [K r] 4 d1-10, 5 s1-2 has IInd row series.

Q. What is the general electronic configuration for $2 n d$ row transition series?

$[N e] 3 d^{1 - 10}, 4 s^{2}$

$[A r] 3 d^{1 - 10}, 4 s^{1 - 2}$

$[Kr] 4 d^{1 - 10}, 5 s^{1 - 2}$

$[X e] 5 d^{1 - 10}, 5 s^{1 - 2}$

Transition elements have three series $3 d, 4 d$ and $5 d$ . $3 d$ series has elements $21 (S c)$ to $30 (Z n)$ atomic number. $4 d$ series has elements $39 (Y)$ to $48 (C d)$ atomic number. $[Kr] 4 d^{1 - 10}, 5 s^{1 - 2}$ has $II n d$ row series.

Q. What is the general electronic configuration for 2nd row transition series?

[Ne]3d1−10,4s2

[Ar]3d1−10,4s1−2

[Kr]4d1−10,5s1−2

[Xe]5d1−10,5s1−2