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Topic: Chemical compound


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  Chemical compound - Encyclopedia, History, Geography and Biography
A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition.
O) is a compound consisting of two hydrogen atoms bonded to an oxygen atom.
The atoms within a compound can be held together by a variety of interactions, ranging from covalent bonds to electrostatic forces in ionic bonds.
www.arikah.com /encyclopedia/Chemical_compound   (345 words)

  
  Chemical compound - Wikipedia, the free encyclopedia
A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition.
Compounds may have a number of possible phases.
Every chemical compound that has been described in the literature carries a unique numerical identifier, its CAS number.
en.wikipedia.org /wiki/Chemical_compound   (190 words)

  
 Chemical compound - Simple English Wikipedia
A chemical compound is a chemical made by joining together atoms of different chemical elements.
Chemical compounds can be liquids, like water which is made from atoms of hydrogen and oxygen joining together.
Chemicals that are not safe are called 'hazardous chemicals', and most of them can only be used by people who have gone to a special school.
simple.wikipedia.org /wiki/Chemical_compound   (416 words)

  
 Chemical reaction - Wikipedia, the free encyclopedia
Chemical reactions are characterized by a chemical change and it yields one or more products which are, in general, different from the reactants.
Classically, chemical reactions encompass changes that strictly involve the motion of electrons in the forming and breaking of chemical bonds, although the general concept of a chemical reaction, in particular the notion of a chemical equation, is applicable to transformations of elementary particles, as well as nuclear reactions.
Chemical reactions may be classified in different ways depending on the particular aspect considered for elaborating the division, or on the branch of Chemistry which the classification originates from.
en.wikipedia.org /wiki/Chemical_reaction   (1541 words)

  
 Chemical compound - Conservapedia
chemical compound is any substance that consists of two or more chemical elements always associated with one another in the same proportion, and that has certain properties deriving from that association that define and distinguish it from other substances.
A molecular compound is a compound which is composed of atoms joined by covalent bonds.
The chemical formula of any compound (ionic or molecular) is either a list of the chemical symbols of its constituent elements, with subscripts to describe their ratio, or else a slightly more complex listing or even a drawing intended to describe not merely the ratio of the constituent elements but also their arrangement.
www.conservapedia.com /Chemical_compound   (847 words)

  
 Chemistry - MSN Encarta
An atom is the smallest unit of an element that has the properties of the element; a molecule is the smallest unit of a compound or the form of an element in which atoms bind together that has the properties of the compound or element.
Most of the physical and chemical properties of atoms, and hence of all matter, are determined by the nature of the electron cloud enclosing the nucleus.
This means, chemically, that metals tend to form positively charged ions, or positively charged atoms or molecules, when they enter into chemical combination.
encarta.msn.com /encyclopedia_762504460_2/Chemistry.html   (2601 words)

  
 Chemistry : Chapter 4 : Overview
Compounds were defined in Chapter 1 as pure substances that can be chemically separated into elements, although always with specific ratios.
In 1 mole the grams of compound are equal to the molar mass of the compound.
A balanced chemical equation describes both the ratio of molecules needed for a chemical reaction and the ratio of moles needed for a chemical reaction.
www.wwnorton.com /college/chemistry/gilbert/overview/ch4.htm   (1537 words)

  
 Chemical Compound : Freebase - The World's Database
Aziridines are a group of organic compound sharing the aziridine functional group which is a three membered heterocycle with one amine group and two methylene groups.
Water is a common chemical substance that is essential for the survival of all known forms of life.In typical usage, water refers only to its liquid form or state, but the substance also has a solid state, ice, and a gaseous state, water vapor.
Bromobimane is a heterocyclic compound that is used as a reagent in biochemistry.
www.freebase.com /view/chemistry/chemical_compound   (1048 words)

  
 Chemical thermodynamics - encyclopedia article - Citizendium
In thermodynamics, chemical thermodynamics is the mathematical study of the interrelation of heat and work with chemical reactions or with a physical change of state within the confines of the laws of thermodynamics.
Chemical thermodynamics can be generally thought of as the application of mathematical methods to the study of chemical questions.
The primary objective of chemical thermodynamics is the establishment of a criterion for the determination of the feasibility or spontaneity of a given transformation.
en.citizendium.org /wiki/Chemical_thermodynamics   (2067 words)

  
 FIIG T089 Index
A chemical substance composed of alkalis and peroxide.
A chemical compound of nonspecific chemical composition, supplied in concentrated form, designed to be used in windshield washers of automobiles to keep windshields clean, and to provide protection against freezing of the aqueous content, after dilution in accordance with recommended instructions.
A chemical compound of nonspecific chemical composition added to the water in whirlpool baths to serve as an antiscum forming compound, and as a deodorant and/or water softener-detergent.
www.dlis.dla.mil /fiigdata/T0890/ainindex.htm   (4241 words)

  
 compound. The Columbia Encyclopedia, Sixth Edition. 2001-07
Compounds are formed from simpler substances by chemical reaction.
A compound differs from a mixture in that the components of a mixture retain their own properties and may be present in many different proportions.
Sodium chloride is an ionic compound; it is made up of electrically charged ions that are present in fixed proportions and are arranged in a regular, geometric pattern (called crystalline structure) but are not grouped into molecules.
www.bartleby.com /65/co/compnd-che.html   (581 words)

  
 Chemical compound - encyclopedia article - Citizendium
A chemical compound is a chemical substance consisting of two or more chemically bonded chemical elements, with a fixed ratio determining the composition.
When molecular compounds are crystallized (converted to a solid), the individual molecules interact - or are held together - by van der Waals forces.
Most known compounds are molecular, a fact that is attributable to the scope of organic chemistry.
en.citizendium.org /wiki/Chemical_compound   (483 words)

  
 Class Definition for Class 423 - CHEMISTRY OF INORGANIC COMPOUNDS
Processes of preparation of an inorganic compound or a nonmetallic element which include chemical treatment or preparation are classified in the appropriate compound or element subclass, unless a process subclass is specifically provided therefor under the compound or element subclass, even though combined with a purely physical operation precedent, subsequent, or both.
for chemical processes where the main intent is to purify a liquid, not to purify or recover a compound or nonmetallic element for Class 423, in regard to treatment of an effluent or waste liquor, the intent of the disclosure must be considered.
Processes wherein a mixture is chemically treated to obtain or recover a compound of a metal contained in the original mixture as an element, a compound or a precursor transmutable to the metal.
www.uspto.gov /go/classification/uspc423/defs423.htm   (6174 words)

  
 salt, chemical compound. The Columbia Encyclopedia, Sixth Edition. 2001-07
chemical compound (other than water) formed by a chemical reaction between an acid and a base (see acids and bases).
Most salts are ionic compounds (see chemical bond); they are made up of ions rather than molecules.
The chemical formula for an ionic salt is an empirical formula; it does not represent a molecule but shows the proportion of atoms of the elements that make up the salt.
www.bartleby.com /65/sa/salt.html   (694 words)

  
 Chemical Molecule Library - Glossary
Bronze is an alloy of copper and tin and brass on of copper and zinc.
The "cis" compound is the one with the groups on the same side of the bond, and the "trans" has the groups on the opposite sides.
Where chemical compounds are broken up into simple molecules and even as far as their original elements.
www.ch.ic.ac.uk /vchemlib/mol/glossary   (4708 words)

  
 Class Definition for Class 508 - SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARANT COMPOSITIONS ...
Processes which are directed to the chemical or physical treatment of used lubricant compositions of this class for the purpose of purification or recovery, or to lubricant compositions described in terms of a method of purification or recovery thereof after use.
Compositions wherein boron is in the inorganic compound.
Compositions wherein silicon or phosphorus is in the inorganic compound.
www.uspto.gov /go/classification/uspc508/defs508.htm   (4935 words)

  
 moles/stoichiometry
A compound is a substance composed of two or more different elements that are chemically combined in a ______ proportion.
A chemical compound can be represented by a specific chemical formula and assigned a name based on the _______ system.
The empirical formula of a compound is the simplest ______- _________ ratio of atoms of the elements in a compound.
www.chemcool.com /regents/molesstoichiometry/molesstoichiometry.htm   (1348 words)

  
 Containment vessel for environmentally sealing a chemical compound - Patent 5333641
The chemical compound must be maintained at the proper temperature for the chemical process in the diffusion furnace.
The material further possesses thermal properties to permit the temperature of the chemical compound in bottle 14 to be maintained at a temperature dictated by the process.
The bottle containing the hazardous chemical is environmentally sealed with separate conduits for transporting the chemical compound and for purging the controlled environment of the containment vessel.
www.freepatentsonline.com /5333641.html   (1626 words)

  
 Chemical compound - Biocrawler   (Site not responding. Last check: )
A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition.
A defining characteristic of a compound is that it has a chemical formula.
The formula does not indicate that a compound is composed of molecules; for example, sodium chloride (table salt, NaCl) is an ionic compound.
www.biocrawler.com /encyclopedia/Chemical_compound   (323 words)

  
 Wikinfo | Chemical compound   (Site not responding. Last check: )
In chemistry, a compound is a substance formed from two or more elements, with a fixed ratio determining the composition.
For example, water is a compound made out of hydrogen and oxygen in the ratio of two to one.
For a compound to be a liquid or a gas and still be called a compound, atoms from the various elements must be stuck together in the form of molecules.
www.wikinfo.org /wiki.php?title=Chemical_compound   (355 words)

  
 Chemical Nomenclature
Compounds can be divided into two basic categories, those which are true binary compounds (they contain only two types of elements), and those which contain more than two different types of elements.
A binary compound is a compound that consists of a combination of two elements.
So far we have seen that in the name of a chemical compound, the first element usually is positive, and is the first part of the name.
library.thinkquest.org /10429/low/nomen/nomen.htm   (1315 words)

  
 Unit Outline (template)
The charge of each ion in an ionic compound may be used to determine the simplest chemical formula for the compound.
Compounds composed of two different elements are known as binary compounds.
The percentage composition of a compound is the percentage by mass of each element in the compound.
www.msu.edu /~fredenb3/main-web-pages/chemistry-sem-1/formulas_and_compounds.htm   (590 words)

  
 Chemical Reactions   (Site not responding. Last check: )
The reaction of two or more elements together results in the formation of a chemical bond between atoms and the formation of a chemical compound.  But why do chemicals react together?  The reason has to do with the participating atoms' electron configurations.
All chemical reactions are accompanied by a change in energy.
When you strike a match you are causing a reaction between the chemicals in the match head and oxygen in the air.
www.visionlearning.com /library/module_viewer.php?mid=54   (901 words)

  
 Chemical Industry Archives
Chemical companies say that their products are rigorously tested for health and safety, their facilities are safe for workers and nearby communities, and their industry is tightly regulated.
Public and private drinking water supplies in West Virginia and Ohio have been contaminated with the chemical-a fluorine-based compound known as C8-as a result of manufacturing and disposal operations at a DuPont Teflon plant in Washington, West Virginia.
The Chemical Industry Archives is a project of the Environmental Working Group.
www.chemicalindustryarchives.org   (714 words)

  
 Chemical compound Summary and Analysis
A compound is a pure substance consisting of two (or more) elements that are chemically bonded in a fixed proportion.
A chemical compound is a substance created when two or more different elements are connected by chemical bonds or valence forces.
Compounds and elements are both distinct substances which is one of the two basic categories of matter.
www.bookrags.com /Chemical_compound   (211 words)

  
 Designing Chemical Compound Libraries for Drug Discovery
The design of chemical compound libraries is a highly relevant skill for bioinformaticians involved in drug discovery.
Whereas eHTS consist of real chemical compounds that are screened in a laboratory environment, vHTS libraries consist of 3D representations of chemical compounds that are screened using computational methods.
Skeletal diversity, for example, is a strategy where the core, backbone, or scaffold elements of chemical compounds are chosen to maximize their variation in 3D shape, electrostatics, or molecular properties.
www.b-eye-network.com /view/2039   (1145 words)

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