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  • Subjects
  • Chemistry CBSE Live product
  • Class 9 (2026-27)
  • Journey Inside the Atom

PT1 Revision II - Journey inside the atom

Theory

1. Structure of the atom

Practice Questions

1. Symbols for elements

Difficulty: easy

1
2. Bohr–Bury rules for electron distribution

Difficulty: easy

2
3. Stability of the atom

Difficulty: easy

1
4. TBQ -Finding the properties of an element

Difficulty: medium

4
5. TBQ - Case study on electronic configuration, valence electrons and valency

Difficulty: hard

3
6. TBQ - Valence electrons

Difficulty: medium

2
7. TBQ - Isotopes and applications

Difficulty: hard

5
8. Calculation of percentage of isotopes

Difficulty: medium

2
9. Comparison between isotopes and isobars

Difficulty: medium

3

Teacher manual

1. Methodical recommendation
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