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SS2: CHEMISTRY - 1ST TERM

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  1. Periodicity and Periodic Table I | Week 1
    5 Topics
    |
    1 Quiz
  2. Quantum Numbers Orbitals & Electrical Structure | Week 2
    6 Topics
    |
    1 Quiz
  3. Periodicity and Periodic Table II | Week 3
    12 Topics
    |
    1 Quiz
  4. Periodicity and Periodic Properties III | Week 4
    11 Topics
    |
    1 Quiz
  5. Periodicity and Periodic Properties IV | Week 5
    5 Topics
    |
    1 Quiz
  6. Mass-Volume Relationship in Reaction | Week 6
    8 Topics
    |
    1 Quiz
  7. Types of Reactions: Oxidation and Reduction | Week 7 & 8
    7 Topics
    |
    1 Quiz
  8. Oxidation – Reduction Reaction II | Week 9
    3 Topics
    |
    1 Quiz
  9. Electrode Potential and Electrochemical Cells I | Week 10
    6 Topics
    |
    1 Quiz
  10. Electrode Potential and Electrochemical Cells II | Week 11
    5 Topics
    |
    1 Quiz
  11. Electrolysis I | Week 12
    8 Topics
    |
    1 Quiz
  12. Electrolysis II | Week 13
    8 Topics
    |
    1 Quiz



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Topic Content:

  • Quantum Numbers

Quantum numbers are mathematical solutions to the problems of the arrangement of electrons around the nucleus in an atom. The electrons in an atom can be identified by four quantum numbers. They are as follows:

1. Principal quantum number [n]

2. Subsidiary or azimuthal number [l]

3. Magnetic quantum number [m]

4. Spin quantum number [s]

1. Principal Quantum Number [n]:  

The principal quantum number [n] has integral values of 1, 2, 3, 4, etc. Each energy level can take 2n2 electrons. They are also denoted by the letters K, L, M, N etc. 

Energy level1234
Shell symbolK LMN

Each of the energy levels also contains sub-levels.

 

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