Making chronological table sometimes help us find a different viewpoint of things already known. This time, I picked up Si and challenged to make its chronological table. I don’t know whether 100th anniversary was celebrated or not in 1928 for Berzelius’ Si isolation. Perhaps not celebrated so much. I guess that the importance of Si was not recognized in those days except for certain people.
However, if we look back based on the figure above, it is clear that the discovery of Schrodinger equation, the foundation of quantum mechanics and band theory that followed, which opened the door to the semiconductor age, was a great present for Si’s 100th birthday. Without quantum mechanics, Si would have continued to be the Si under 100 years old, which seemed to have no possibility of changing the whole lifestyle of us.
