The Challenger is a major salvo in the Horsepower Wars, offering muscle-car metal and seriously awesome engines. The 6.4-liter Hemi V-8 makes 485 hp and 475 lb-ft; choose either a six-speed manual or eight-speed automatic. The aptly named Hellcat has a supercharged 6.2-liter V-8 good for 707 hp and 650 lb-ft, with either a six-speed manual or eight-speed automatic. The automatic is faster, hitting 60 mph in 3.6 seconds, while the manual is more fun and still quick doing 0â60 in 3.9 seconds. Jump to Instrumented Test â 2015 Dodge Challenger SRT Hellcat Manual.
1 Alkali metals. 2  The alkali metals make up group 1 of the Table, and comprise Li through Fr. They have very similar behavior and characteristics. 3  Hydrogen is group 1 but exhibits few characteristics of a metal and is often categorized with the nonmetals. 4  Alkaline earth metals. Alkaline earth metals. 2  The alkaline earth metals make up group 2 of the periodic table, from Be through Ra. 3  The alkaline earth metals have very high melting points and oxides that have basic alkaline solutions.
The alkaline earth metals are all silver-colored and soft, and have relatively low densities, melting points, and boiling points. In chemical terms, all of the alkaline metals react with the halogens to form the alkaline earth metal halides, all of which are ionic crystalline compounds (except for beryllium chloride, which is covalent).