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Topic: Nonmetal


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In the News (Sat 15 Jun 19)

  
  AllRefer.com - nonmetal (Chemistry) - Encyclopedia   (Site not responding. Last check: 2007-10-21)
nonmetal, chemical element possessing certain properties by which it is distinguished from a metal.
In general, this distinction is drawn on the basis that a nonmetal tends to accept electrons and form negative ions and that its oxide is acidic.
Nonmetals are poor conductors of heat and electricity (see conduction) and do not have the luster of metals.
reference.allrefer.com /encyclopedia/N/nonmetal.html   (322 words)

  
 Nonmetal - Simple English Wikipedia
Nonmetal or non-metal means there is no metal traces or any at all in the substance or chemical element.
An example of a solid that is a nonmetal is sulfur.
An example of a liquid that is a nonmetal is bromine.
simple.wikipedia.org /wiki/Nonmetal   (142 words)

  
 Nonmetal   (Site not responding. Last check: 2007-10-21)
Together with the metal s and metalloid s, a nonmetal is one of three categories of chemical element s as distinguished by ionization and bonding properties.
Nonmetals may form ionic bond s with metals by gaining electron s, or covalent bonds with other nonmetals.
Many nonmetals (hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine) are diatomic, and most of the rest are otherwise polyatomic.
www.serebella.com /encyclopedia/article-Nonmetal.html   (422 words)

  
 Nonmetal Information Center - most reactive nonmetal
The lightest nonmetal exception is hydrogen, most reactive nonmetal which is usually placed at the upper left with the alkali metals, but behaves like a nonmetal under most nonmetal conditions.
Nonmetals may form ionic bonds with metals by gaining is potassium a metal, mettaloid, or nonmetal electrons, or covalent bonds with other nonmetals.
Many nonmetals (hydrogen, nitrogen, nonmetal vise grip oxygen, fluorine, chlorine, bromine, and french horn nonmetal mouthpiece iodine) are diatomic, and most of the rest are otherwise polyatomic.
www.scipeeps.com /Sci-Chemistry_Topics_Mi_-_O/Nonmetal.html   (384 words)

  
 Nonmetal   (Site not responding. Last check: 2007-10-21)
Most nonmetals are found at the upper of the periodic table.
There are only twelve known nonmetals compared over eighty metals but nonmetals make up of the earth particularly in the outer layers.
nonmetals (hydrogen nitrogen oxygen fluorine chlorine bromine iodine) are diatomic and most of the rest are polyatomic.
www.freeglossary.com /Nonmetal   (349 words)

  
 CHEMystery: The Periodic Table of the Elements: Nonmetals   (Site not responding. Last check: 2007-10-21)
Basically, the elements that lack the properties of metals are said to have nonmetallic properties and are therefore called nonmetals.
All of the group 0 (18) elements (the noble gases--mostly inert) are gases consisting of single atoms.
The nonmetals also lack the malleability and ductility of the metals.
library.thinkquest.org /3659/pertable/nonmetal.html   (270 words)

  
 EPA: Federal Register: Diesel Particulate Matter Exposure of Underground Metal and Nonmetal Miners
The metal and nonmetal community will also have an additional three and a half years to comply with the final concentration limit, which in many cases means these mines may have a full five years of technical assistance before any engineering controls are required.
Portions of that material relevant to underground metal and nonmetal mines is reiterated here (although somewhat reorganized), and the material is amended and supplemented where appropriate as a result of comments and additional information added to the record since the proposal was published.
Diesel engines in metal and nonmetal underground mines, and in surface coal mines, range up to 750 HP or greater, although equipment size, and thus the size of the engine, can be limited by production requirements, the dimensions of mine openings, and other factors.
www.epa.gov /fedrgstr/EPA-IMPACT/2001/January/Day-19/i996a.htm   (19346 words)

  
 MSHA News Release: MSHA Declares Feb. 20-24 "Focus on Safety Week" For Metal and Nonmetal Mines Nationwide[02/17/2006]
Dye added that he is asking metal and nonmetal mine operators to discuss safety practices with employees before each shift and before any mining activity begins throughout the week.
The number of fatal accidents in metal and nonmetal mines rose from 27 in 2004 to 35 in 2005.
MSHA distributed materials to metal and nonmetal mine operators stressing the importance of identifying hazards before beginning a task, taking steps to control or eliminate those hazards and ensuring that miners wear the appropriate protective equipment.
www.dol.gov /opa/media/press/msha/MSHA20060284.htm   (328 words)

  
 Nonmetal   (Site not responding. Last check: 2007-10-21)
Nonmetals může tvořit iontové vazby s kovy tím, že získá elektronynebo covalent svazky s jinými nonmetals.
Je jich tam jen dvanáct známé nonmetals, vyrovnal se přes osmdesát kovy ale nonmetals tvoří většinu země, zvláště ve vnějších vrstvách.
Mnoho nonmetals (vodík, dusík, kyslík, fluor, chlór, brom, a jodid) být diatomica většina ze zbytku jsou jinak polyatomic.
wikipedia.infostar.cz /n/no/nonmetal.html   (174 words)

  
 Inorganic Nomenclature - Binary A Compounds
Binary A compounds are two element compounds composed of a Group A Metal chemically bound to a nonmetal.
Nonmetals are those atoms that stair-step down the Group A elements begining with boron and ending with antimony.
Fluorine is a group VIIA nonmetal which achieves a noble gas configuration by gaining 1 valence electron, thus forming the fluorine ion.
www.sonic.net /~famweb/personal/Peter/naming/binarya.htm   (379 words)

  
 Nonmetal Jewelry
Nonmetals Acrylic Nylon Teflon and Glass - Materials for Piercings and...
Thirteen major retailers sued over lead in jewelry - State tests showed high levels of lead in both the metal and nonmetal parts of costume jewelry the retailers market primarily to teenagers and...
AG Sues 13 Over Lead in Jewelry - State tests showed high levels of lead in both the metal and nonmetal parts of costume jewelry the retailers market primarily to teenagers and...
www.jewelry-nfo.com /nonmetal-jewelry.html   (270 words)

  
 [No title]
When nonmetallic elements act as oxidizing agents, the nonmetal is reduced to its monatomic anion or a protonated form.
The monatomic nonmetal anions and their protonated forms usually exhibit the lowest possible oxidation number which gives them the ability to transfer electrons back to other materials (act as reducing agents).
Nonmetals can be divided into two groups based on their redox properties.
www.wou.edu /las/physci/ch412/nonmetal.htm   (467 words)

  
 EPA: Federal Register: Diesel Particulate Matter Exposure of Underground Metal and Nonmetal Mines
Furthermore, we also examined information regarding types of engines and equipment found in underground metal and nonmetal mines along with their various ventilation systems and concluded that the 2001 final rule was technologically feasible for the mining industry (66 FR 5889).
The cost for an average underground metal and nonmetal mine was projected to be approximately $128,000 annually primarily for investment in equipment to meet the interim and final concentration limits.
Furthermore, many metal and nonmetal mines are located in remote areas of the country, at high altitudes, or are subject to extremely hot or cold environments.
www.epa.gov /fedrgstr/EPA-IMPACT/2005/September/Day-07/i17802.htm   (12568 words)

  
 Inorganic Nomenclature - Binary B Compounds
Binary B compounds are two element compounds composed of a Group B Metal chemically bound to a nonmetal.
nonmetal atom stem carbon carb- nitrogen nitr- phosphorus phosph- arsenic arsen- oxygen ox- sulfur sulf- selenium selen- fluorine fluor- chlorine chlor- bromine brom- iodine iod-
We know this is binary I compound because B is a group IIIA metal and N is a nonmetal.
www.sonic.net /~famweb/personal/Peter/naming/binaryb.htm   (390 words)

  
 Chapter6
The corresponding annual average fatality rates during this 5-year period were 340 and 300 per 100,000 workers in coal mining and metal and nonmetal mining, respectively.
Following metal mining, the decreases in lost-workday injury rates were as follows: coal (35%), nonmetal (31%), stone (30%), and sand and gravel mining (24%).
A 46% decrease was observed for independent contractor workers in metal and nonmetal mining, and a 6% decrease was observed for independent contractor workers in coal mining.
www2.cdc.gov /chartbook/chap6/chartbk6.htm   (1799 words)

  
 15.9
The polarity of a X—H bond increases with the electronegativity of the nonmetal atom.
The stronger acid is the one with the greater radius of its nonmetal atom.
These acids are nonmetal hydrides of elements within the third row of the period table.
www.mhhe.com /physsci/chemistry/chang7/ssg/chap15_9sg.html   (752 words)

  
 Diesel Particulate Matter Exposure of Underground Metal and Nonmetal Miners; Proposed Rule [Proposed Rules] [08/14/2003]
The existing final rule pertaining to ``Diesel Particular Matter Exposure of Underground Metal and Nonmetal Miners,'' was published in the Federal Register on January 19, 2001 (66 FR 5706, RIN 1219-AB11) and amended on February 27, 2002 (67 FR 9180).
Some metal and nonmetal mining operations are seasonal in that they are operated intermittently or operate at less than full production during certain times.
These full-day seminars were offered free of charge in the major underground metal and nonmetal mining regions of the country to facilitate attendance by key mining industry personnel.
www.dol.gov /msha/regs/fedreg/proposed/2003020190.htm   (13348 words)

  
 Typical Acids and Bases
The electronegativity of the oxygen is much larger than that of the metal, so the electrons tend to remain with the oxygen atom, resulting in the formation of a positive metal ion and the OH ion.
Nonmetal hydroxides, however, are acids because the difference in the electronegativities between the nonmetal and the oxygen is relatively small.
The electronegativities of the oxygen is more or less equal to that of the nonmetal, so the electrons are considered to be shared.
library.thinkquest.org /C006669/data/Chem/acidsbases/typical.html   (224 words)

  
 Safety Standards for Explosives at Metal and Nonmetal Mines; Final Rule[Rules and Regulations] [08/19/1996]
These final standards for explosives at metal and nonmetal mines are based on consideration of the entire rulemaking record, including all written comments and exhibits received related to the January 1991 and the December 1993 final regulations, as well as the January 5, 1995, proposal and the public hearing record.
The standards in part 56 apply to all surface metal and nonmetal mines; those in part 57 apply to underground and surface areas of underground metal and nonmetal mines.
The minimum temperature at which sufficient vapor is released by a liquid to form a flammable vapor-air mixture near the surface of the liquid.
www.dol.gov /msha/regs/fedreg/final/96_16861.htm   (13517 words)

  
 nonmetal - Adwords Research by Velocityscape
nonmetal: an element that is brittle and nonductile as a solid, has no luster, and is a poor conductor of heat and electricity.
nonmetal, chemical element possessing certain properties by which it is...
In general, this distinction is drawn on the basis that a nonmetal tends to...
www.googspy.com /SearchTerm.aspx?id=63182   (234 words)

  
 Health Standards for Occupational Noise Exposure
There will be an increase of 33,955 paperwork burden hours for small metal and nonmetal mines and increase of 38,183 paperwork burden hours for large metal and nonmetal mines in year one.
Metal and nonmetal mine operators reported 650 cases among surface miners and 154 cases among underground miners, a total of 804 cases.
A possible explanation of the difference between reported cases of noise- induced hearing loss among coal and metal and nonmetal miners may be that there is more frequent use of engineering noise controls in metal and nonmetal mining.
www.nonoise.org /hearing/msharegs/fr13se99-28.htm   (17993 words)

  
 EPA: Federal Register: Diesel Particulate Matter Exposure of Underground Metal and Nonmetal Miners
57.5066(b) as published on January 19, 2001, requires the operators of underground metal and nonmetal mines to authorize and require miners who operate diesel-powered equipment to affix a visible and dated tag to the equipment at any time the equipment operator notes any evidence that the equipment may require maintenance.
Paragraph (b)(2) requires the mine operator to make certain that the tagged equipment be ``promptly'' examined by a person authorized by the mine operator to maintain diesel equipment, and prohibits removal of the tag until after the examination is completed.
The composition of the existing fleet in an underground metal and nonmetal mine is not impacted by the final rule.
www.epa.gov /fedrgstr/EPA-IMPACT/2001/July/Day-05/i16838.htm   (2803 words)

  
 InorgNomenclature   (Site not responding. Last check: 2007-10-21)
Binary Acids (Compounds with H and one nonmetal)
Compounds are named by placing the metal before the nonmetal and changing the name of the nonmetal by replacing the last syllable with the suffix -ide.
The nonmetal with the lower group number is named first and the name of the second nonmetal is changed by replacing the last syllable with the suffix -ide.
www.silcom.com /~adbrown/tutor/inorgnomenclature.htm   (555 words)

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