L-7. Atomic Radius | Class 9 Chemistry Chapter 8 Modern Periodic Table | Prof. Majid Ali

Atomic Radius | Class 9 Chemistry Chapter 8 (Modern Periodic Table)
Instructor: Prof. Majid Ali (Gold Medalist)

Welcome to MJD Chemistry, your trusted platform for easy and complete learning of 9th class chemistry according to the Punjab Board syllabus.
In this video, Prof. Majid Ali explains “Atomic Radius” — an important concept from Chapter 8: Modern Periodic Table — in a clear, simple, and exam-focused way.

You will learn:
✅ What is atomic radius
✅ How to measure atomic size
✅ Variation of atomic radius in periods and groups
✅ Trends in atomic size across the periodic table
✅ Examples and explanation with data tables

📘 Topic Summary:
• Atomic radius is half the distance between the nuclei of two bonded identical atoms.
• As we move left to right in a period → atomic size decreases due to increasing nuclear charge.
• As we move down a group → atomic size increases due to addition of new shells and shielding effect.

📚 Chapter: Modern Periodic Table (Chapter 8)
🎓 Class: 9th Chemistry
👨‍🏫 Teacher: Prof. Majid Ali (Gold Medalist)

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💡 Why Watch This Lecture:
• Based on Punjab Textbook Board syllabus
• Concept explained with examples and data
• Easy to understand for beginners and exam preparation
• Helpful for matric students, teachers, and competitive exams

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