Chemicals

Chemicals

Chemicals (pronunciation: /ˈkɛmɪkəls/) are substances formed by chemical reactions and have a specific chemical composition. They can be either natural or synthetic and are used in a variety of applications, from industrial manufacturing to medical treatments.

Etymology

The term "chemical" comes from the Greek word "khēmeía" which means "to pour." This refers to the process of mixing or combining substances, which is a fundamental aspect of chemistry.

Related Terms

• Chemical reaction: A process that leads to the transformation of one set of chemical substances to another.
• Chemical composition: The arrangement, type, and ratio of atoms in molecules of chemical substances.
• Chemical substance: A form of matter having constant chemical composition and characteristic properties.
• Chemical element: A pure chemical substance consisting of one type of atom distinguished by its atomic number.
• Chemical compound: A chemical substance composed of many identical molecules composed of atoms from more than one element.
• Chemical bond: A lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds.
• Chemical formula: A way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule.

See Also

• Chemistry
• Biochemistry
• Pharmaceutical chemistry
• Organic chemistry
• Inorganic chemistry

External links

• Medical encyclopedia article on Chemicals
• Wikipedia's article - Chemicals

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