1) Atomic number 9 2) Chemical element 3) Chemical element 4) Element 5) Element discovered in 1886 6) Element in Teflon 7) Element number 9 8) Element with the symbol F 9) Halogen 10) Most reactive element 11) Poisonous yellow gas 12) Teflon ingredient 13) The F element in CFC
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1) Halogen
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Fluorine is a chemical element with the symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. Among the elements, fluori...
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• (n.) A non-metallic, gaseous element, strongly acid or negative, or associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. It always occurs combined, is very active chemically, and possesses such an avidity for most elements, and silicon especially, that it can neither be prepared nor kept in gla...
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http://thinkexist.com/dictionary/meaning/fluorine/
most reactive chemical element and the lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table.[15 related articles]
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http://www.britannica.com/eb/a-z/f/40
(F) A pale yellow, highly corrosive, highly poisonous, gaseous element. It occurs naturally as fluorite, cryolite, and fluorapatite (see apatite). Fluorine is the lightest halogen and the most electronegative, oxidizing, and reactive of all the elements. Steel wool bursts i...
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<chemistry, element> A non-metallic, gaseous element, strongly acid or negative, or associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. It always occurs combined, is very active chemically, and possesses such an avidity for most elements, and silicon especially, that it can neither be prepared ...
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(F) (floor´ēn) a chemical element, atomic number 9, atomic weight 18.998. 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.
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Flu'or·ine (flū'ŏr*ĭn or -ēn; 104)
noun [ New Latin
fluorina : confer German
fluorin , French
fluorine . So called from its occurrence in the mineral
fluorite .]
(Chemistry) A non-metallic, gaseous element, strongly acid or negative, and a...
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http://www.encyclo.co.uk/webster/F/49
(F) Type: Term Pronunciation: flōr′ēn Definitions: 1. 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.
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Fluorine is a very poisonous greenish-yellow gaseous element with the symbol F belonging to the group known as the halogens. It is the most chemically reactive element (many substances ignite spontaneously in it), and for this reason it is never found uncombined. Fluorine was isolated in 1886 by Moissan by the electrolysis of a solution of potassic...
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[
n] - a nonmetallic univalent element belonging to the halogens
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The most reactive non-metallic element. A pale yellow gas which is both corrosive and poisonous, it reacts vigorously with most oxidizable substances at room temperature, and forms fluorides. It is used in the production of metallic and other fluorides, some of which are used to introduce fluorine into organic compounds, i.e., the fluorocarbons.
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Fluorine is a pale greenish yellow gas that is the first in the halogen group. Symbol F
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Pale yellow, gaseous, non-metallic element, atomic number 9, relative atomic mass 19. It is the first member of the halogen group of elements, and is pungent, poisonous, and highly reactive, uniting directly with nearly all the elements. It occurs naturally as the minerals fluorite (CaF2) and cryolite (Na3
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the most reactive nonmetallic element, a pale-yellow, corrosive, toxic gas that occurs combined, esp. in fluorite, cryolite, phosphate rock, and other minerals. Symbol: F; at. wt.: 18.9984; at. no.: 9.
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