Easy MCQ +4 / -1

The ionic radius of Fe²⁺ is larger than Fe³⁺ because:

  1. A Fe²⁺ has more protons
  2. B Fe²⁺ has two extra electrons Correct answer
  3. C Fe²⁺ has higher nuclear charge
  4. D Fe²⁺ is more electronegative

Solution

Fe²⁺ has 24 electrons; Fe³⁺ has 23 electrons. Same nuclear charge but Fe²⁺ has more electron-electron repulsion → larger radius.

About this question

Subject: Chemistry · Chapter: Periodic Table and Periodicity · Topic: Atomic and Ionic Radii

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