Substances versus mixtures

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  • While the term chemical substance is a precise technical term that is synonymous with "chemical" for professional chemists, the meaning of the word chemical varies for non-chemists within the English speaking world or those using English. For industries, government and society in general in some countries,[10] the word chemical includes a wider class of substances that contain many mixtures of such chemical substances, often finding application in many vocations.

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  • An element is a chemical substance that is made up of a particular kind of atoms and hence cannot be broken down or transformed by a chemical reaction into a different element, though it can be transmutated into another element through a nuclear reaction. This is so, because all of the atoms in a sample of an element have the same number of protons, though they may be different isotopes, with differing numbers of neutrons.

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  • Tham khảo sách 'the story of alchemy and the beginnings of chemistry, by m. m', khoa học tự nhiên, hoá học phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • The Sceptical Chymist or Chymico-Physical Doubts & Paradoxes, Touching the Spagyrist's Principles Commonly call'd Hypostatical; As they are wont to be Propos'd and Defended by the Generality of Alchymists. Whereunto is præmis'd Part of another Discourse relating to the same Subject. Author: Robert Boyle Release Date: October 8, 2007

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  • The Project Gutenberg eBook, Creative Chemistry, by Edwin E. Slosson This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online

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  • The Project Gutenberg EBook of On Laboratory Arts, by Richard Threlfall This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.org Title: On Laboratory Arts Author: Richard Threlfall Release Date: September 27, 2007

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  • Tham khảo sách 'the chemistry, properties and tests of precious stones, by john', khoa học tự nhiên, hoá học phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Project Gutenberg's Familiar Letters of Chemistry, by Justus Liebig This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net Title: Familiar Letters of Chemistry Author: Justus Liebig Editor: John Gardner Posting Date: August 8, 2009

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  • Project Gutenberg Etext of An Introduction to Chemical Science by R.P. Williams Copyright laws are changing all over the world, be sure to check the laws for your country before redistributing these files!!! Please take a look at the important information in this header. We encourage you to keep this file on your own disk, keeping an electronic path open for the next readers. Please do not remove this. This should be the first thing seen when anyone opens the book. Do not change or edit it without written permission....

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