Halogen | Elements, Examples, Properties, Uses, & Facts | Britannica
2024年10月29日 · Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), …
Chalcogen - Wikipedia
3 天之前 · Chalcogens also form compounds with halogens known as chalcohalides, or chalcogen halides. The majority of simple chalcogen halides are well-known and widely used as chemical …
List of Halogens (Element Groups) - ThoughtCo
2024年7月30日 · The halogens are highly reactive nonmetallic elements. They commonly form ionic bonds with metals and covalent bonds with other nonmetals. The halogens are the only …
Chlorine - Wikipedia
1 天前 · It is the second-most abundant halogen (after fluorine) and 20th most abundant element in Earth's crust. These crystal deposits are nevertheless dwarfed by the huge reserves of …
Selenium - Wikipedia
1 天前 · Upon heating, it softens at 50 °C and converts to gray selenium at 180 °C; the transformation temperature is reduced by presence of halogens and amines. [14] The red α, β, …
Periodic table - Elements, Groups, Blocks | Britannica
2024年11月10日 · The elements of the long periods show a gradual increase in hardness and melting point from the beginning alkali metals to near the centre of the period and then at …
Halogen - Learnool
2024年3月10日 · Halogens, also known as the fluorine group, are a group of elements located in group 17 of the periodic table. This group comprises six chemical elements: fluorine (F), …
Fluorine | Uses, Properties, & Facts | Britannica
2024年11月13日 · fluorine (F), most reactive chemical element and the lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. Its chemical activity can be …
Halogens - CK12-Foundation
2024年11月1日 · The elements of Group VIIA (new Group 17 - fluorine, chlorine, bromine, iodine, and astatine) are called the halogens (yellow column). The term “halogen” means “salt-former” …
The Westport Library Resource Guides: Periodic Table: Halogens
2024年5月19日 · Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), …