Class 9 Chemistry | New Book Chapter 2 Lecture 6 | Bohr's Atomic Model 🌀 | Punjab Board скачать в хорошем качестве

Class 9 Chemistry | New Book Chapter 2 Lecture 6 | Bohr's Atomic Model 🌀 | Punjab Board

Complete Lecture Series: Class 9 Chemistry | Complete New Book (Chapters 1-13) | Punjab Board 🔥📘    • Class 9 Chemistry | Complete New Book (Cha...   🚀 Welcome to Chapter 2 of Class 9 Chemistry – Bohr's Atomic Model! In this lecture, we explore Niels Bohr's revolutionary atomic model, which addressed the limitations of previous models and introduced the concept of quantized energy levels. This session aligns with the curriculum of the Board of Intermediate and Secondary Education (Punjab). 📘 Topics Covered in This Lecture: 🔹 Limitations of Rutherford's Atomic Model:     • Rutherford's model could not explain the stability of atoms and the discrete spectral lines observed in atomic emission spectra. 🔹 Introduction to Bohr's Atomic Model:     • In 1913, Niels Bohr proposed a new model incorporating quantum theory to explain atomic structure and stability. 🔹 Postulates of Bohr's Model:     1. Quantized Orbits: Electrons revolve around the nucleus in specific, fixed orbits without radiating energy.     2. Energy Levels: Each orbit corresponds to a specific energy level; electrons can only occupy these defined levels.     3. Energy Absorption and Emission: Electrons absorb or emit energy only when transitioning between orbits, with the energy change given by Planck's equation: ΔE = hv, where 'h' is Planck's constant and 'v' is the frequency of radiation. 🔹 Successes of Bohr's Model:     • Successfully explained the spectral lines of the hydrogen atom.     • Provided a foundation for future quantum mechanical models of the atom. 🔹 Limitations of Bohr's Model:     • Could not accurately predict spectra of atoms with more than one electron.     • Did not account for the wave nature of electrons. This lecture is specially designed for Class 9 students under the Punjab Board system, including: Board of Intermediate and Secondary Education, Lahore Board of Intermediate and Secondary Education, Faisalabad Board of Intermediate and Secondary Education, Multan Board of Intermediate and Secondary Education, Rawalpindi Board of Intermediate and Secondary Education, Sargodha Board of Intermediate and Secondary Education, Dera Ghazi Khan Board of Intermediate and Secondary Education, Bahawalpur Board of Intermediate and Secondary Education, Gujranwala Board of Intermediate and Secondary Education, Sahiwal ✅ Watch till the end for exam-focused explanations and key insights that will help you excel in your Board exams! 📌 Stay Connected: 👉 Like, share, and subscribe for more exam-focused Chemistry lectures and complete Punjab Board syllabus coverage! #Class9Chemistry #BohrsAtomicModel #QuantumTheory #AtomicStructure #PunjabBoard #NewBook2025 #ChemistryLecture #StudyWithMe #LearnChemistry #LahoreBoard #FaisalabadBoard #MultanBoard #RawalpindiBoard #SargodhaBoard #GujranwalaBoard #SahiwalBoard #ExamPreparation #EducationalContent #ScienceForPakistan