Chapter 19 · Class 11-12 & JEE/NEET
Periodic Table & Periodicity
45 topics in 12 parts
Key ideas
Diagnostic Comparison & Property Matrix
| Parameter / Feature | Standard State / Condition A | Altered State / Condition B |
|---|---|---|
| Driving Force | Thermodynamic control (more stable product) | Kinetic control (lower activation barrier) |
| Solvent Dependency | Polar protic solvent stabilizes charge separation | Polar aprotic solvent accelerates bare nucleophilicity |
| Temperature Influence | High temperatures favor elimination / endothermic | Mild temperatures favor addition / exothermic |
| Common Pitfall | Overlooking rearrangement or stereochemical inversion | Neglecting boundary limits or stoichiometric coefficients |
All 45 topics in Periodic Table & Periodicity
Genesis of Periodic Classification
- Dobereiner's Triads
- Newlands' Law of Octaves
- Lother Meyer Curve
- Mendeleev's Periodic Table
Long Form of Periodic Table
- Modern Periodic Law
- Moseley's Work
- Periods, Groups & Blocks
- s, p, d & f Block Classification
Classification of Elements Based on Electronic Configuration
- Prediction of Period & Group Number
- Bohr's Classification
- Naming of Super Heavy Elements
- Aufbau Principle & Electronic Configurations
Periodic Trends in Properties
- Combined Trends & Comparisons
- Hydration Energy
- Lattice Energy
- Solubility Trends of Ionic Compounds
- Diagonal Relationships
- Anomalies & Second-Period Behavior
Effective Nuclear Charge & Shielding Effect
- Effective Nuclear Charge (Zeff)
- Shielding & Screening Effect
- Slater's Rules
Atomic Radius
- Covalent & Metallic Radius
- Van der Waals Radius
- Periodic Trends in Atomic Size
- Lanthanoid Contraction
- Post-Transition Contraction
Ionic & Hydrated Radius
- Isoelectronic Species
- Ionic Radius Trends
- Hydrated Radius & Ionic Mobility
Ionization Energy
- Successive Ionization Energies
- Factors Affecting Ionization Energy
- Periodic Trends in Ionization Enthalpy
- Applications of Ionization Energy
Electron Affinity
- Electron Gain Enthalpy Trends
- Factors Affecting Electron Affinity
- Exothermic & Endothermic Electron Gain
Electronegativity
- Pauling Scale
- Mulliken & Allred-Rochow Scales
- Periodic Trends in Electronegativity
- Applications of Electronegativity
Oxides & Oxidation States
- Acidic, Basic & Amphoteric Oxides
- Valency & Oxidation States
- Periodic Trends in Chemical Reactivity
Metallic & Non-Metallic Character
- Metallic Character Trends
- Non-Metallic Character & Electropositivity