Atomic Radius & Periodic Trends: Concept + Exceptions | Educhem Chemistry Classes

Welcome to Educhem Chemistry Classes! 🧪 In this highly important, exam-oriented class, we dive deep into the Periodic Trends in Properties of Elements, focusing specifically on Atomic Radius. Instead of just memorizing, learn the concepts and logic behind the trends! We cover everything from Covalent, Metallic, and Van der Waals radii to the most crucial exceptions that frequently appear in JEE Main, NEET, and competitive board exams (like the Group 13 anomaly). If you found this class helpful, don't forget to LIKE, SHARE, and SUBSCRIBE for the next part where we will cover Ionic Radius and its exceptions! ⏱️ Video Chapters / Timestamps: 00:00 - Introduction to Periodic Trends & Periodicity 02:30 - Key Physical Properties of Elements 05:00 - What is Atomic Radius? 07:24 - Types of Atomic Radii (Covalent, Metallic, Van der Waals) 14:38 - MCQs & Practice Questions 16:41 - Trends in Atomic Radius across a Period (Left to Right) 22:32 - Trends in Atomic Radius down a Group (Top to Bottom) 24:32 - Crucial Exceptions in Atomic Radii (Important for Exams!) 26:36 - Group 13 Exception (Al vs. Ga) Explained 29:08 - Summary & Next Class Preview (Ionic Radius) 📝 Topics Covered: • Definition of Periodicity and Periodic Properties • Measurement of Atomic Radius (Picometer, Angstrom) • Detailed explanation of Covalent, Metallic, and Van der Waals Radius • Why atomic size decreases across a period and increases down a group • The role of Nuclear Charge and Screening/Shielding Effect • Anomalies and Exceptions in Group 13 (Boron Family) and Noble Gases 🔍 Keywords / Search Queries: Periodic table trends, Atomic Radius explained, Covalent Radius, Metallic Radius, Van der Waals Radius, Periodic properties in Bengali, Chemistry class 11 Chapter 3, JEE Main Chemistry preparation, NEET Chemistry lectures Bengali, Group 13 exceptions atomic radius, Shielding effect, Educhem Chemistry Classes. #Chemistry #PeriodicTable #AtomicRadius #JEEMain #NEETPreparation #Class11Chemistry #ChemistryInBengali #EduchemChemistryClasses