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Relative Atomic Mass – Chapter 2 | 9th Class Chemistry (Punjab Board)
Learn everything about Relative Atomic Mass in this lecture by Prof. Majid Ali (Gold Medalist) as per the 9th class Chemistry syllabus. This video explains the importance of comparing atomic masses, the concept of amu (atomic mass unit), and how carbon-12 is used as a reference scale.

📚 What you’ll learn:
✔️ Definition and concept of relative atomic mass
✔️ Atomic mass unit (amu) and its calculation
✔️ Why carbon-12 is used as a standard
✔️ Examples: H-1 and S-32 atomic masses
✔️ Historical context of atomic mass measurement
✔️ Explanation in Urdu for better understanding

Whether you're preparing for board exams or building your chemistry fundamentals, this lecture makes the topic simple and easy to grasp.

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