Bohr’s Model Derivations 2026 for MDCAT/ECAT: Derivation of Radius, Energy, Change in Energy, Frequency, Wavelength, and Wave Number of Spectral Line — Bohr’s Model Explained (2025 Notes)

Learn the complete derivation of the radius, energy, change in energy (ΔE), frequency, wavelength, and wave number of spectral lines based on Bohr’s atomic model. Perfect for IX, X, and XI Chemistry students (2025 syllabus).

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In this post, we’ll derive step-by-step all the essential formulas from Bohr’s atomic model — including radius of orbit, energy of electron, change in energy, frequency, wavelength, and wave number of spectral lines. These derivations are crucial for understanding hydrogen spectra and are frequently asked in board exams and entry tests. Let’s begin with clear explanations and easy-to-follow steps for each concept.

• Bohr’s Atomic Model

• Radius Derivation Formula

• Energy of Electron Derivation

• Change in Energy ΔE Derivation

• Frequency and Wavelength Relation

• Wave Number of Spectral Line

• Hydrogen Spectrum Notes

• Class IX / XI Chemistry

• Chemistry Formulas Explained

• Spectral Series (Lyman, Balmer, Paschen)

• Modern Physics Notes

• Board Exam Preparation 2025

• New Syllabus Chemistry 2025

• Inam Jazbi Chemistry Blog

• Complete Derivations Notes

• Step-by-Step Chemistry Derivations

• Study Material for Chemistry Students

• Easy Chemistry Notes PDF

• Learn Chemistry by Inam Jazbi

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