Which reaction will need maximum energy to remove its one electron?
Correct answer: D. C2+→ C3+ + e-
- A. Na → Na++ e-
- B. Ca → Ca++ e-
- C. K → K++ e-
- D. C2+→ C3+ + e-
Explanation
In Option D, an electron is being removed from an already positively charged ion, not a neutral atom like the others. The nuclear attraction experienced by the outer electrons would be stronger due to the positive charge, so more energy would be required to remove an electron.
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