Structure of the Atom | Class 9 Science | Explained by Asha Bansal

Описание: Unlock the foundation of Chemistry with our Class 9 Science video on Structure of the Atom, explained in detail by Mrs. Asha Bansal, a veteran educator with over 40 years of teaching experience and former CBSE evaluator. This video covers everything students need to know — what an atom is, subatomic particles, atomic and mass numbers, common mistakes to avoid, and exam weightage tips. Perfect for quick revision, understanding key concepts, and boosting your exam confidence. Clear visuals, easy explanations, and student-friendly guidance make learning Chemistry simple and engaging.

Define an atom. Why is it called the smallest unit of matter?
Name the three subatomic particles of an atom and state their charges.
What is the atomic number (Z)? How does it help identify an element?
What is the mass number (A) of an atom? How is it calculated?
How do atomic number and mass number differ? Give examples.
If an element has 11 protons, 12 neutrons, and 11 electrons, calculate its atomic number and mass number.
Explain why electrons are not counted in the mass number.
List two common mistakes students make while studying this chapter and explain how to avoid them.
Why is the structure of the atom important for understanding chemical reactions and elements?
Write a short note on the exam weightage of this chapter. Which types of questions are usually asked?
Mrs. Asha Bansal – Senior Biology Educator & CBSE Evaluator (20 yrs)
🌟 40+ years of teaching experience
📚 Classes 10: Physics, Chemistry & Biology
🧬 Classes 11–12: Biology (Botany & Zoology) | NEET Prep
🏆 CBSE • ICSE • IB | Concept Clarity • Exam Excellence • Trusted Mentorship

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