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  • Subjects
  • Chemistry CBSE Live product
  • Class 9 (2025-26)
  • Structure of the atom

Annual Revision VI - Structure of the atom

Theory

1. Structure of the atom

Practice Questions

1. Discovery of structure of the atom

Difficulty: easy

2
2. Valency identification

Difficulty: easy

1
3. Chemical properties of isotopes and isobars

Difficulty: easy

1
4. Calculation of percentage of isotopes

Difficulty: medium

2
5. Comparison of atomic models

Difficulty: medium

3
6. Limitations of Bohr and Thomson models of the atom

Difficulty: medium

2
7. Calculate the number of electrons and protons

Difficulty: medium

3
8. Electronic configuration of ions

Difficulty: medium

2
9. Formation of compound

Difficulty: hard

3
10. Comparison of subatomic particles

Difficulty: hard

6

Teacher manual

1. Methodical recommendation
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