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" "Isolated material particles are abstractions, their properties being definable and observable only through their interaction with other systems.
Niels Henrik David Bohr (7 October 1885 – 18 November 1962) was a Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922. Bohr was also a philosopher and a promoter of scientific research.
Biography information from Wikiquote
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