Question

The general electronic configuration of d-block elements is:

• A. \( (n - 1) d^{10}ns^1 \)
• B. \( (n - 1) d^{10}ns^2 \)
• C. \( (n - 1) d^{10}n^2s^3 \)
• D. \( (n - 1) d^n ns^1 \)

Hint:

In d-block elements, the d-orbitals are filled first, and the final configuration involves the \(ns^1\) orbital for the transition elements.

Answer 1

The Correct Option is A

The general electronic configuration for d-block elements (transition metals) is \( (n - 1) d^{10}ns^1 \), with \(n\) denoting the principal quantum number of the valence shell. This indicates that the d-orbitals are filled before the s-orbital.

Step 1: Within the d-block, the d-orbitals are filled prior to the s-orbital.