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Chemical substance | |
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About 10 pages (3,075 words) in 3 products |
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Encyclopedia and Summary Information
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Chemicals Summary
1,202 words, approx. 4 pages The general public often construes the word "chemical" to mean a harmful synthetic substance. In fact, however, the term applies to any element or compound, either natural or synthetic. The thousands of compounds that make up the human...
summary from source:

Chemical substance Information
1,789 words, approx. 6 pages
 A chemical substance is a material with a definite chemical composition. It is a concept that became firmly established in the late eighteenth century after work by the chemist Joseph Proust on the composition of some pure chemical compounds such as...


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Chemical substance | |
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About 10 pages (3,075 words) in 3 products |
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