1. Observing Atoms

2. What phenomena in the observed (macroscopic) world are undermined with atomic characteristics?

3. Why do we envisage this world consisting of particles ?

4. Scientists view versus non-scientists

5. How do we know about energy?

9. What phenomena conflict with the wave model of electromagnetic radiation?

14. What phenomena conflict with the particle model of matter?

15. What phenomena conflict with the particle model of matter?

18. Any effort to moderate the world of particle-wave complex?

19. Heisenberg Uncertainty Principle

20. Lift up the Veil of the Atoms

22. Model of Atoms

23. Energy Diagram

24. Energy States
vs.
Spectrum

29. wavefunction() versus probability function (2)

40. Structure of Many-Electron Atoms

49. Aufbau principle

50. Stern & Gerlach

52. singlet state S = 0, 2S+1 = 1
triplet state, S = (1/2)x2 = 1, 2S+1 = 3

56. Periodicity of Atomic Properties