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Books give you in-depth information on a topic, and are good sources for information that happened in the past or interpretive information for an on-going event or problem.
OCR A2 Chemistry
by
Helicon Publishing and RM Education PLC.
By 1900, chemistry had come a long way from its origins in medieval times with the alchemists. The understanding of the elements and chemical reactions had become a distinct science separate from natural philosophy, or physics as it is now known. The existence of the atom was still in dispute, although most scientists accepted it as a useful concept. The first subatomic particle, the electron, had been discovered, but scientists did not fully understand what they had found.
Kirk-Othmer Encyclopedia of Chemical Technology, Concise
by
Raymond E. Kirk; Donald F. Othmer; Kirk-Othmer (Editor); Concisehmer
Abridged version of the 26 volume Kirk-Othmer Encyclopedia of chemical technology. 4th ed. New York : Wiley, c1991-c1998.
