Question

Which of the following series of transition elements has general electronic configuration, \([\text{Kr}]\,4d^{1-10}\,5s^{0-2}\)?

• A. 3d series elements
• B. 4d series elements
• C. 5d series elements
• D. 6d series elements

Hint:

Krypton core followed by 4d means the second transition series.

Answer 1

The Correct Option is B

Step 1: Identify by core
Argon core: 3d. Krypton core: 4d. Xenon core: 5d. Radon core: 6d.

Step 2: Answer
Option (B).

Final Answer:
4d series. \[ \boxed{\text{(B)}\ \text{4d series elements}} \]