Atomic Structure and Bohr Model

📋 Course Outline

1. Dalton’s Atomic Theory
2. Discovery of Subatomic Particles
3. Atomic Numbers and Isotopes
4. Atomic Mass and Isotopic Abundance
5. Electromagnetic Radiation
6. Planck’s Quantum Theory
7. Photoelectric Effect
8. Limits of Rutherford’s Model
9. Bohr’s Atomic Model
10. Hydrogen Spectra and Bohr Limits

📖 1. Dalton’s Atomic Theory

🔑 Key Concepts & Definitions

• Dalton’s atomic theory : Dalton’s atomic theory — proposed by John Dalton in 1808, regarded the atom as the indivisible ultimate particle of matter

📝 Essential Points

• The theory explained these laws:
  • conservation of mass
  • constant composition
  • multiple proportions

📖 2. Discovery of Subatomic Particles

🔑 Key Concepts & Definitions

• Electron : a negatively charged subatomic particle found in all atoms and identified through cathode-ray experiments
• Nucleus : the tiny, dense, positively charged region of an atom that contains almost all of its mass