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Glossary of Chemical Terms - Y

YA B C D E F G H I J K L M N O P Q R S T U V W X Y Z yellow A color. yoctomole (ymol) 10-24 moles; A single molecule corresponds to 1/Avogadro's number, or 1.66 X 10-24 moles, or 1.66 ymol.…

Glossary of Chemical Terms - Z

ZA B C D E F G H I J K L M N O P Q R S T U V W X Y Z zeolite A natural or synthetic hydrated aluminosilicate with an open three-dimensional crystal structure which water molecules are held in…

Major Chemical and Nuclear Disasters

Accidents happen, but when they destroy the delicate balance of nature or cause a large number of people to suffer, they become disasters. Here are some of the largest disasters that have been…

Chemical Ali

(Encyclopedia) Chemical Ali: see Majid, Ali Hassan al-.

chemical analysis

(Encyclopedia) chemical analysis, the study of the chemical composition and structure of substances. More broadly, it may be considered the corpus of all techniques whereby any exact chemical…

chemical bond

(Encyclopedia) chemical bond, mechanism whereby atoms combine to form molecules. There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to…

chemical equation

(Encyclopedia) chemical equation, group of symbols representing a chemical reaction. There are a number of other symbols used in chemical equations. A symbol written above or below the reaction…

chemical equilibrium

(Encyclopedia) chemical equilibrium, state of balance in which two opposing reversible chemical reactions proceed at constant equal rates with no net change in the system. For example, when hydrogen…