Synthesized answer
The provided passages do not contain enough information to explain the key concepts of "On the Constitution of Atoms and Molecules" in my own words. The only information given is the title of the book, its author, and its category, which is "Atomic theory" [146]. This title suggests the book discusses the fundamental structure of atoms and molecules. However, without any further content from the book, it is impossible to detail its key concepts or explain them in my own words.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: On the Constitution of Atoms and Molecules by Niels Bohr Categories: Atomic theory Pages: 146