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The pair of ions that have same electronic configuration
  • a)
    Fe2+ and Mn2+
  • b)
    Fe2+ and Co3+
  • c)
    Fe3+ and Co3+
  • d)
    V2+ and Cr3+
Correct answer is option 'B,D'. Can you explain this answer?
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Most Upvoted Answer
The pair of ions that have same electronic configurationa)Fe2+ and Mn2...
You simply count the electron number, though , co is present just after fe, so from this logic you count the electron number is same in fe2+ and co3+,(just think) simultaneously v2+, cr3+ electron number is same, in mathematical, fe 2+ electron number is 26-2=24,, and co 3+,electron number is 27-3=24,so simultaneously v2+, and cr 3+ has same number of electron,
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The pair of ions that have same electronic configurationa)Fe2+ and Mn2...
Explanation:

Electronic Configuration of Fe2+:
Fe2+ has the electron configuration [Ar] 3d6. It loses two electrons from its 3d orbital to achieve a stable configuration.

Electronic Configuration of Mn2+:
Mn2+ has the electron configuration [Ar] 3d5. It loses two electrons from its 3d orbital to achieve a stable configuration.

Electronic Configuration of Fe3+:
Fe3+ has the electron configuration [Ar] 3d5. It loses three electrons from its 3d orbital to achieve a stable configuration.

Electronic Configuration of Co3+:
Co3+ has the electron configuration [Ar] 3d6. It loses three electrons from its 3d orbital to achieve a stable configuration.

Electronic Configuration of V2+:
V2+ has the electron configuration [Ar] 3d3. It loses two electrons from its 3d orbital to achieve a stable configuration.

Electronic Configuration of Cr3+:
Cr3+ has the electron configuration [Ar] 3d3. It loses three electrons from its 3d orbital to achieve a stable configuration.

Explanation of the correct options:

Option B (Fe2+ and Co3+):
Both Fe2+ and Co3+ have the same electron configuration of [Ar] 3d6. They both lose electrons from their 3d orbital, but the number of lost electrons is different. Fe2+ loses 2 electrons, while Co3+ loses 3 electrons. Therefore, they have the same electronic configuration.

Option D (V2+ and Cr3+):
Both V2+ and Cr3+ have the same electron configuration of [Ar] 3d3. They both lose electrons from their 3d orbital, but the number of lost electrons is different. V2+ loses 2 electrons, while Cr3+ loses 3 electrons. Therefore, they have the same electronic configuration.

Conclusion:
The pair of ions that have the same electronic configuration are Fe2+ and Co3+ (option B) and V2+ and Cr3+ (option D). These ions have the same electron configuration but differ in the number of electrons lost.
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The pair of ions that have same electronic configurationa)Fe2+ and Mn2+b)Fe2+ and Co3+c)Fe3+ and Co3+d)V2+ and Cr3+Correct answer is option 'B,D'. Can you explain this answer?
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