The halogens make up Group VIIA of the Periodic Table of the elements. Elemental halogens are diatomic molecules. However, due to their high reactivity, the halogens are never found in nature in native form. The family name means "salt-forming," from the Greek for salt, halos, and for ...
The name fluorine comes from the name of the mineral in which the element was found, fluorspar. Fluorine was one of the last common elements to be isolated. It is so reactive that chemists searched for more than 70 years to find a way to extract the element from its compounds. Then, in...
halogen: Any of a group of five chemically related nonmetallic elements including fluorine, chlorine, bromine, iodine, and astatine.
Nameofhalogenoalkane;Halogenelements;☆ Review:Typesofhalogenoalkane;Nucleophilicsubstitution;Eliminationreaction;Useofhalogenoalkane;Introduce:Typesofhalogenoalkane 1 •a.thecarbonatombondedtothe–Clatomisattachedtooneothercarbonatom—primaryhalogenoalkane;•b.thecarbonatombondedtothe–Clatomisattachedtotwo...
Halogen \¦ha-lə-jən\ [Sw, fr.hal- + -gen] (1842)n.The elements of group 7a of the periodic table; fluorine, chlorine, bromine, and iodine (F, Cl, Br, and I). The fifth member, astatine, is rare, radioactive, and unstable, with a half-life less than 9 h, so ...
The halogens are chemical elements that constitute Group 17 of the periodic table. The six non-metallic elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (As) and tennessine (Ts). The name "halogen" comes from a Greek word meaning "salt-producing," since ...
※ 提供单词"halogen"的中文意思、发音示范及音标对照,中英文词源、例句和用法等。 中文词源 halogen 卤素 halo-,盐,词源同salt,-gen,生成,词源同generate.即生成盐的卤素。 英文词源 halogen (n.) general name for elements of the chlorine family, 1842, from Swedish, coined by Swedish chemist Baron Jö...
The binary compounds of a metal with the halogens are the halides. Most binary halides are ionic. However, mercury, the elements of group 13 with oxidation states of 3+, tin(IV), and lead(IV) form covalent binary halides.The direct reaction of a metal and a halogen produc...
The name "halogens" owes its origin to the Greek language. "Halogens" means "salt formers". Halogens can be defined as elements that form salts when they react with metals. There are six halogens- fluorine, chlorine, bromine, iodine, astatine, and tennessine. Tennessine is the latest ...
,Chemistry. any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals. Discover More Other Words From ha·log·e·nous[ha-, loj, -, uh, -n, uh, s],adjective ...