Atoms and Molecules Free Lessons for Class 9th SCIENCE NCERT

In This Course you will get to know about

• What is Matter
• Laws of Chemical combination
• Dalton’s atomic theory
• Atomic Symbols
• Molecules
• Molecular mass
• Ions and Types of Ions
• Valency 
• Mole Concept and Avogadro Number
• Solved and unsolved problems Based on Atoms and Molecules