fluorine

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fluorine

 (F) [floor´ēn]
a chemical element, atomic number 9, atomic weight 18.998. (See Appendix 6.)
fluorine 18 a radioactive isotope of fluorine, atomic mass 18, having a half-life of 1.8925 hours; it has been used as a tracer in positron emission tomography.

fluor·ine (F),

(flōr'ēn), Avoid the mispronunciation fluorīne.
A gaseous chemical element, atomic no. 9, atomic wt. 18.9984032; 18F (half-life of 1.83 h) is used as a diagnostic aid in various tissue scans.
[L. fluere, flow]

fluorine

/flu·o·rine/ (F) (floor´ēn) a chemical element, at. no. 9.

fluorine (F)

[floo͡r′ēn, flo̅o̅′ərēn]
Etymology: L, fluere, to flow
an element of the halogen family and the most reactive of the nonmetals. Its atomic number is 9, and its atomic mass is 19.00. It occurs in nature only as a component of substances such as fluorspar, cryolite, and phosphate rocks. It can be prepared by the electrolytic decomposition of hydrogen fluoride and in its pure form is a pale yellow toxic gas 1.6 times heavier than air. It is also a component of very stable fluorocarbons used in the manufacture of resins and plastics. As a component of fluorides, it is widely distributed throughout the soils of the earth, enters plants, is ingested by humans, and is absorbed from the GI tract. Fluorides in the atmosphere and industrial dust are absorbed by the lungs and the skin. Relatively soluble compounds, such as sodium fluoride, are almost completely absorbed by humans. The relatively insoluble compounds, such as cryolite, are poorly absorbed. Small amounts of sodium fluoride are added to the water supply of many communities to harden tooth enamel and decrease dental caries. Excessive amounts of fluoride can mottle tooth enamel and cause osteosclerosis. Acute fluoride poisoning and death can result from the accidental ingestion of insecticides and rodenticides containing fluoride salts.

fluor·ine

(F) (flōr-ēn')
A gaseous chemical element; atomic no. 9, atomic weight 18.9984032; 18F (half-life of 1.83 hours) is used as a diagnostic aid in various tissue scans.

fluor·ine

(F) (flōr-ēn')
A gaseous chemical element used as a diagnostic aid in various tissue scans.

fluorine

(flŏŏr´ēn),
n an element of the halogen family and the most reactive of the nonmetals. Its atomic number is 9, and its atomic weight is 19. Small amounts of sodium fluoride added to the public water supply will reduce the incidence of dental caries, particularly among children. Excessive amounts of fluoride can mottle tooth enamel and cause osteosclerosis. Acute fluoride poisoning can cause death.

fluorine

a chemical element, atomic number 9, atomic weight 18.998, symbol F. See Table 6.

fluorine poisoning
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Bonus: Flourine, the thirteenth most abundant element, is released into the environment naturally via (a.
By replacing some of the oxygen in these compounds with flourine, a group at Energy Conversion Devices, Inc.
Year To % of Total Year to % of Total Date Sales Date Sales Sale of Product 2009 2009 2008 2008 Radiochemical Products $1,714,529 28% $1,379,906 25% Cobalt Products (including bulk cobalt sales) 2,180,445 36% 1,616,020 29% Cobalt Products (excluding bulk cobalt sales) 1,215,580 24% 1,127,764 22% Nuclear Medicine Standards 1,800,935 29% 1,864,099 33% Radiological Services 239,722 4% 634,201 11% Flourine Products 878 0% 0 0% Transportation 186,335 3% 108,217 2% Corporate revenue 0 0% 0 0% Total Segments (including bulk cobalt sales) $6,122,844 100% $5,602,443 100% Total Segments (excluding bulk cobalt sales) 5,157,979 100% 5,114,187 100%