Question

Give the general electronic configuration of four series of d-block elements.

Answer 1

d-block elements have general valence electronic configuration (n – 1)d^{1 – 10} ns^{1 –} 2. 

The four series of d-block elements have the general electronic configuration as shown below:

i. 3d series: [Ar] 3d^1-10 4s^1-2 

ii. 4d series: [Kr] 4d^1-10 5s^0-2 

iii. 5d series: [Xe] 5d^1-10 6s² 

iv. 6d series: [Rn] 6d^1-10 7s²

Electronic configuration of the elements belonging to the 3d series of d-block elements:

3d series or first row transition series (Sc to Zn) belonging to the fourth period has the general electronic configuration [Ar] 3d^1-10 4s^1-2 . 

The following table lists the general electronic configuration of first row transition elements.

[Ar] = 1s² 2s² 2p⁶ 3s² 3p⁶