This document discusses the evolution of atomic structure models from Dalton's model to the current quantum mechanical model. It introduces key atomic concepts such as electrons, protons, neutrons, orbitals, quantum numbers including principal, orbital, magnetic and spin quantum numbers. It also covers electronic configuration, Hund's rule, the Aufbau principle, Pauli principle, and oxidation-reduction concepts including oxidation states and oxidizing and reducing agents.

1. Atomic Structure Dalton’s Atomic model

2. Atomic Structure J J Thomson model

3. Atomic Structure Rutherford model

4. Atomic Structure Bohr’s model

5. Atomic Structure Sommerfield model

6. Atomic Structure Sommerfield model

7. Atomic Structure Quantum mechanical model

8. Atomic Structure Electron, Proton and Neutron

9. Atomic Structure Orbit

10. Atomic Structure Orbital

11. Atomic Structure Orbital

12. Atomic Structure Electronic configuration

13. Atomic Structure s and p orbitals

14. Atomic Structure Quantum numbers

15. Atomic Structure Quantum numbers Principal Q.No

16. Atomic Structure Quantum numbers Principal Q.No Principal Q.No

17. Atomic Structure Quantum numbers Orbital quantum number

18. Atomic Structure Quantum numbers Orbital Orbital Orbital Orbital Magnetic quantum number

19. Atomic Structure Quantum numbers Spin quantum number

20. Atomic Structure Hund’s Rule Orbitals of same energy level

21. Atomic Structure Aufbau Principle

22. Atomic Structure Pauli Principle n l m s 1 0 0 +1/2 1 0 0 -1/2

23. Atomic Structure Oxidation LEO L oss of E lectron - O xidation Na  Na + + e - (oxidation)

24. Atomic Structure Reduction GER G ain of E lectron - R eduction Cl + e -  Cl - (Reduction)

25. Atomic Structure Oxidising and reducing agents