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The energy of an electron in first Bohr orbit of H - atom is -13.6 eV. The energy value of electron in the excited state of Li$^{2+}$ is : (JEE ...

December 20, 2025
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Atomic StructureIntro, Dalton's theory, discharge tube & oil drop experiments, Rutherford scatteringMEDIUMJEE Chemistry
The energy of an electron in first Bohr orbit of H - atom is -13.6 eV. The energy value of electron in the excited state of Li$^{2+}$ is : (JEE Main Online 2014) **Options:** - **A.** -27.2 eV - **B.** 30.6 eV - **C.** -30.6 eV - **D.** 27.2 eV --- **Difficulty:** MEDIUM | **Chapter:** Atomic Structure | **Topic:** Intro, Dalton's theory, discharge tube & oil drop experiments, Rutherford scattering

Official Solution

## ✅ Correct Answer: **C** ### 📖 Detailed Explanation: **Solution:** **Analyzing each option:** (A) ✗ -27.2 eV... (B) ✗ 30.6 eV... (C) ✓ -30.6 eV... (D) ✗ 27.2 eV... **Correct Answer: (C)** **Key Concept:** Apply fundamental principles of atomic structure to identify the correct option. --- *This is an official solution provided by Chem Mantra. For more chemistry questions and solutions, explore our [question bank](/courses).*

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Atomic StructureIntro, Dalton's theory, discharge tube & oil drop experiments, Rutherford scatteringMEDIUMJEE Chemistry