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| | fluorine | (ฟลู'อะรีน) n. ธาตุแก๊สสีเหลืองอ่อนเป็นแก๊สพิษ;F -fluoric adj. |
| | | Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminum, silicon, phosphorus, sulfur... | Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminum, Here Comes the Flood (2008) |
| | ฟลูออรีน | (n) fluorine, Thai Definition: ธาตุลำดับที่ 9 สัญลักษณ์ F เป็นอโลหะ ลักษณะเป็นแก๊สสีเขียวแกมเหลือง มีสมบัติคล้ายคลอรีนแต่ให้ปฏิกิริยาเคมีไวกว่า, Notes: (อังกฤษ) |
| | ฟลูออรีน | [flūørīn] (n) EN: fluorine FR: fluorine [ f ] ; fluorite [ m ] |
| | | | fluorine | (n) a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite, Syn. atomic number 9, F |
| | Fluorine | n. [ NL. fluorina: cf. G. fluorin, F. fluorine. So called from its occurrence in the mineral fluorite. ] (Chem.) A non-metallic, gaseous element of atomic number 9, strongly acid or negative, and 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 glass vessels, but may be contained in lead vessels. If set free it immediately attacks a containing glass vessel, so that it was not isolated until 1886. It is a pungent, corrosive, colorless gas. Symbol F. Atomic weight 19.00. [ 1913 Webster ] ☞ Fluorine unites with hydrogen to form hydrofluoric acid, which is the agent employed in etching glass. It occurs naturally, principally combined as calcium fluoride in fluorite, and as a double fluoride of aluminium and sodium in cryolite. [ 1913 Webster ] |
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