Electronic Configuration
Among the following species, which one has the electronic configuration [Ar] 3d5?
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About This Question
- Subject
- chemistry
- Chapter
- d- and f-block elements
- Topic
- electronic configuration
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Mn2+
Atomic number of Mn is 25, so Mn has configuration [Ar] 3d5 4s2. On forming Mn2+, two 4s electrons are removed first, giving [Ar] 3d5. Fe2+ is [Ar] 3d6, while Cr3+ and V2+ are both [Ar] 3d3. Hence only Mn2+ has the configuration [Ar] 3d5.
This easy difficulty chemistry question is from the chapter d- and f-block elements, covering the topic of electronic configuration. It appeared in the 2025 exam.
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