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Search Results for “Chemical_compound”
 
 
1) chemical warfare. The Columbia Encyclopedia, Sixth Edition. 2001
...Ancient armies attacking or defending fortified cities threw burning oil and fireballs. A primitive type of flamethrower was employed as early as the 5th cent. B.C.;...

2) chemical industry. The Columbia Encyclopedia, Sixth Edition. 2001
...During the 19th and 20th cent. technological advances in the chemical industry dramatically altered the world's economy. Chemical processes have created pesticides...

3) chemical reaction. The Columbia Encyclopedia, Sixth Edition. 2001
...Energy is released or is absorbed, but no loss in total molecular weight occurs. When, for example, water is decomposed, its molecules, each of which consists of...

4) chemical equation. The Columbia Encyclopedia, Sixth Edition. 2001
...The arrow points in the direction of the reaction-from the reactants (substances that react) toward the product or products. In this case the reactants are hydrogen...

5) chemical equilibrium. The Columbia Encyclopedia, Sixth Edition. 2001
...The reason reactants in a reversible reaction are never completely converted to product is that an opposing reaction is taking place simultaneously, i.e., some of...

6) chemical bond. The Columbia Encyclopedia, Sixth Edition. 2001
...There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to lead to the formation of an aggregate with...

7) chemical analysis. The Columbia Encyclopedia, Sixth Edition. 2001
...More broadly, it may be considered the corpus of all techniques whereby any exact chemical information is obtained. There are two branches in analytical chemistry:...

8) salt, chemical compound. The Columbia Encyclopedia, Sixth Edition. 2001
...Characteristics and Classification of SaltsThe most familiar salt is sodium chloride, the principal component of common table salt. Sodium chloride, NaCl, and water,...

9) copper, chemical element. The Columbia Encyclopedia, Sixth Edition. 2001
...Copper and some of its alloys have been used by humanity since the Bronze Age. One of the first metals known to humans, free copper was probably mined in the Tigris-Euphrates...

10) lead, chemical element. The Columbia Encyclopedia, Sixth Edition. 2001
...One of the oldest metals used by humanity, lead was known to the ancient Egyptians and Babylonians. The Romans used it for pipes and in solder. It was one of the...

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