WBCS.LIVE practice question

O²⁻ is isoelectronic with

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. F⁻
  2. Cl⁻
  3. Li⁺
  4. K⁺

Correct answer and explanation

Correct answer: F⁻

Explanation: ✅ Correct Answer: A. F- 📚 Explanation: Isoelectronic species are atoms or ions that have the same number of electrons. An Oxygen atom has 8 electrons, so O2- has 10 electrons (8 + 2). A Fluorine atom has 9 electrons, so the F- ion also has 10 electrons (9 + 1). Therefore, O2- and F- are isoelectronic with each other. This concept is a fundamental part of atomic structure in chemistry.