Question
Which of the following series of transition elements has general electronic configuration, [ Kr ]\,4d^ 1-10 \,5s^ 0-2 ?
MHT CET
Chemistry
d and f Block Elements
2026
MHT CET 2026 (16 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. 3d series elements
- B. 4d series elements
- C. 5d series elements
- D. 6d series elements
Answer
B. 4d series elements
Step-by-step solution
The general electronic configuration [ Kr ]\,4d^ 1-10 \,5s^ 0-2 corresponds to the transition elements of the 5th period. In these elements, the 4d subshell is progressively filled from Yttrium (Y) to Cadmium (Cd). Since the 4d orbitals are being filled, this series is known as the 4d series of transition elements. Answer: 4d series elements
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