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A halide is a binary compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative than the halogen, to make a fluoride, chloride, bromide, iodide, or astatide compound. Many salts are halides. All Group 1 metals form halides with the halogens and they are white solids. A binary compound is a chemical compound consisting of only atoms of two different elements, e. ...
The halogens or halogen elements are a series of nonmetal elements from Group 17 (old-style: VII or VIIA; Group 7 IUPAC Style) of the periodic table, comprising fluorine, F, chlorine, Cl, bromine, Br, iodine, I, and astatine, At. ...
Properties In chemistry and physics, an atom (Greek ἄτομος or átomos meaning indivisible) is the smallest particle still characterizing a chemical element. ...
The periodic table of the chemical elements A chemical element, or element for short, is a type of atom that is defined by its atomic number; that is, by the number of protons in its nucleus. ...
In chemistry, radicals (often referred to as free radicals) are atomic or molecular species with unpaired electrons on an otherwise open shell configuration. ...
It has been suggested that this article or section be merged with electronegativity. ...
Fluoride is the ionic form of fluorine. ...
The chloride ion is formed when the element chlorine picks up one electron to form an anion (negatively-charged ion) Cl−. The salts of hydrochloric acid HCl contain chloride ions and are also called chlorides. ...
A bromide is a phrase, or person who uses phrases, which have been used and repeated so many times as to become either insincere in their meaning, or seem like an attempt at trying to explain the obvious. ...
An iodide ion is an iodine atom with a −1 (negative one) charge. ...
General Name, Symbol, Number Astatine, At, 85 Series Halogens Group, Period, Block 17 (VIIA), 6, p Density, Hardness no data, no data Appearance metallic Atomic properties Atomic weight [210] amu Atomic radius no data Covalent radius 127 pm van der Waals radius no data Electron configuration [Xe]4f14 5d10 6s2...
A magnified crystal of a salt (halite/sodium chloride) Salt covering the floor of Bad Water in Death Valley, CA, the lowest point in the US. A salt, in chemistry, is any ionic compound composed of cations (positively charged ions) and anions (negative ions) so that the product is neutral...
A halide ion is a halogen atom bearing a negative ion. The halide anions are fluoride (F−), chloride (Cl−), bromide (Br−), iodide (I−) and astatide (At−). Such ions are present in all ionic halide salts. An anion is an ion with negative charge. ...
Fluoride is the ionic form of fluorine. ...
The chloride ion is formed when the element chlorine picks up one electron to form an anion (negatively-charged ion) Cl−. The salts of hydrochloric acid HCl contain chloride ions and are also called chlorides. ...
A bromide is a phrase, or person who uses phrases, which have been used and repeated so many times as to become either insincere in their meaning, or seem like an attempt at trying to explain the obvious. ...
An iodide ion is an iodine atom with a −1 (negative one) charge. ...
General Name, Symbol, Number Astatine, At, 85 Series Halogens Group, Period, Block 17 (VIIA), 6, p Density, Hardness no data, no data Appearance metallic Atomic properties Atomic weight [210] amu Atomic radius no data Covalent radius 127 pm van der Waals radius no data Electron configuration [Xe]4f14 5d10 6s2...
An ionic bond can be formed after two or more atoms give up (or gain) electrons, so as to become ions. ...
Halides in organic chemistry In organic chemistry halides represent a functional group. Any organic compound that contains a halogen atom can be considered a halide. Alkyl halides are organic compounds of the type R-X, containing an alkyl group R covalently bonded to a halogen X. Organic chemistry is a specific discipline within chemistry which involves the scientific study of the structure, properties, composition, reactions, and preparation (by synthesis or by other means) of chemical compounds consisting of primarily carbon and hydrogen, which may contain any number of other elements, including nitrogen, oxygen, halogens as well...
In organic chemistry, functional groups are specific groups of atoms within molecules, that are responsible for the characteristic chemical reactions of those molecules. ...
In chemistry, an alkyl halide is an organic molecule of the form R_X, where X is a halide and R contains a carbon atom bonded to other functional groups or hydrogens. ...
An alkyl is a univalent radical containing only carbon and hydrogen atoms arranged in a chain. ...
Covalent bonding is a form of chemical bonding characterized by the sharing of one or more pairs of electrons between atoms, in order to produce a mutual attraction, which holds the resultant molecule together. ...
Pseudohalides resemble halides in their charge and reactivity; common examples are azides NNN-, isocyanate -NCO, Isocyanide, CN-, etc. An azide is the N3- anion, the anion of hydrazoic acid or a reactive group in organic chemistry where a carbon substituent is attached as RN3. ...
Isocyanate is the chemical group of atoms -N=C=O (1 nitrogen, 1 carbon, 1 oxygen), as opposed to cyanate, -O-C≡N, which is formed from cyanogen in the normal -ate manner. ...
An isocyanide (erroneously called isonitrile) is a functional group in organic synthesis containing carbon and nitrogen. ...
A chemical test for the detection of halogen in chemical substances is the Carius halogen method. In chemistry, a chemical test is qualitative or semi-quantitative procedure designed to prove the existence of a chemical compound or chemical group with the aid of a specific reagent. ...
The Carius halogen method in analytical chemistry is a method for the quantitative determination of halogens in chemical substances [1]. In this technique a chemical substance is oxidized with fuming nitric acid under pressure (in a sealed glass tube) in the presence of silver nitrate at a maximum operating temperature...
Halides in Lighting Metal halides are used in high-intensity discharge lamps called metal halide lamps, such as those used in modern street lights. These are more energy-efficient than mercury-vapor lamps, and have much better colour rendition than orange high-pressure sodium lamps. Metal halide lamps are also commonly used in greenhouses or in rainy climates to supplement natural sunlight. 15 kW Xenon short-arc lamp used in IMAX projectors High-intensity discharge (HID) lamps include these types of electrical lamps: mercury vapor, metal halide (also HQI), high-pressure sodium, low-pressure sodium and less common, xenon short-arc lamps. ...
Metal halide lamps, a member of the high-intensity discharge (HID) family of lamps, produce high light output for their size, making them a compact, powerful, and efficient light source. ...
A roadway light in front of a red sky at night A street light, street lamp, light standard or lamp standard, is a raised source of light on the edge of a road, turned on or lit at a certain time every night. ...
In physics and engineering, including mechanical and electrical engineering, energy efficiency is a dimensionless number, with a value between 0 and 1 or with times 100 given in percent. ...
A Mercury-vapor lamp is a gas discharge lamp which uses mercury in an excited state to produce light. ...
Color is an important part of the visual arts. ...
Rendition is a legal term meaning surrender or turn over, particularly from one jurisdiction to another, and applies to property as well as persons. ...
The colour orange occurs between red and yellow in the visible spectrum at a wavelength of about 585–620 nm. ...
A LPS / SOX streetlight at full power A sodium vapor lamp is a gas discharge lamp which uses sodium in an excited state to produce light. ...
HID (High-intensity discharge) lamps however, contribute highly to light pollution. Sodium-vapor are favored for this reason. This time exposure photo of New York City shows sky glow, one form of light pollution. ...
Examples Examples of halides are: This articles section called Other facts does not adequately cite its references or sources. ...
Potassium iodide is a white crystalline salt with chemical formula KI, used in photography and radiation treatment. ...
Lithium chloride behaves as a fairly typical ionic compound, although the Li+ ion is very small. ...
Copper(II) chloride is the higher chloride of copper, with the formula CuCl2. ...
Wikipedia does not have an article with this exact name. ...
The chemical compound bromomethane is an organic halogen compound with formula CH3Br. ...
The compound iodoform is a yellow, crystalline, volatile substance, I3CH, having a penetrating odor (in older chemistry texts, the smell is sometimes referred to as the smell of hospitals) and sweetish taste, and analogous to chloroform. ...
Silver chloride (also called silver(I) chloride) is a chemical compound with chemical formula AgCl and is composed of one silver and one chlorine molecule. ...
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