Group 7
Group 7 may refer to: * G7, an international group of finance minister *Group 7 element, chemical element classification *Halogens (alternative name) *Group 7 Rugby League, rugby league competition in New South Wales, Australia *Group 7 (racing) Group 7 was a set of regulations for automobile racing created by the Commission Sportive Internationale (CSI), a division of the modern Fédération Internationale de l'Automobile. There were two distinct sets of Group 7 regulations: * Group 7 t ...

Group 7 Element
Group 7, numbered by IUPAC nomenclature, is a group of elements in the periodic table. They are manganese (Mn), technetium (Tc), rhenium (Re), and bohrium (Bh). All known elements of group 7 are transition metals. Like other groups, the members of this family show patterns in their electron configurations, especially the outermost shells resulting in trends in chemical behavior. Chemistry Like other groups, the members of this family show patterns in its electron configuration, especially the outermost shells: Bohrium has not been isolated in pure form. History Manganese was discovered much earlier than the other group 7 elements owing to its much larger abundance in nature. While Johan Gottlieb Gahn is credited with the isolation of manganese in 1774, Ignatius Kaim reported his production of manganese in his dissertation in 1771. Group 7 contains the two naturally occurring transition metals discovered last: technetium and rhenium. Rhenium was discovered when ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Halogens
The halogens () are a group in the periodic table consisting of five or six chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts). In the modern IUPAC nomenclature, this group is known as group 17. The word "halogen" means "salt former" (or "salt maker"). When halogens react with metals, they produce a wide range of salts, including calcium fluoride, sodium chloride (common table salt), silver bromide and potassium iodide. The group of halogens is the only periodic table group that contains elements in three of the main states of matter at standard temperature and pressure. All of the halogens form acids when bonded to hydrogen. Most halogens are typically produced from minerals or salts. The middle halogens—chlorine, bromine, and iodine—are often used as disinfectants. Organobromides are the most important class of flame retardants, while elemental halogens are dangerous and can be toxic. History The fl ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Group 7 Rugby League
South Coast Group 7 Rugby League (or Group 7 Rugby League for simplicity) is the divisional boundary drawn from the Southern Illawarra and South Coast regions (from the town of Warilla south to Ulladulla) of New South Wales, Australia and is governed by the NSWCRL. The main semi-professional competition, (named South Coast Group 7 VB First Grade for sponsorship reasons), comprises ten (10) teams from across the region. Group 7 Rugby League also administers reserve grade, third grade, and under-18s competitions, Ladies League Tag, as well as looking over many junior competitions. Clubs The following twenty clubs compete in South Coast Group 7 competitions, with ten teams in the first-grade competition, seven clubs competing in lower grades and three clubs being junior standalone clubs. Due to the COVID-19 pandemic in Australia the commencement of 2020 season was postponed. Matches began on 25 July. Ten clubs, including Mt Warrigal and Milton-Ulladulla, also field Women's Lea ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]