Division of Periodic Table into s-, p-, d- and f blocks on the Basis of Electronic Configurations. The long form of periodic table can be divided into four main blocks. These are s-, p-, d- and f-blocks. The division of elements into blocks is primarily based upon their electronic configuration as shown in Fig. 6.2.
What is it? The EquiCam is the ultimate piece of filming equipment for equestrian sports, a miniature super light weight camera (just 38g) and two special riding hat camera mounts (elastic hat strap and a hat mount). Film your rides in full 1080p HD for fun and for safety.
Let's look at some bikes. Check out this quick, 30-second vid of the U.S. Army training military dispatch riders in the 1940s: They're riding around on the Harley-Davidson WLA, which first saw production in 1940. Harley engineers took an existing civilian bike, the WL, and adapted it for military use with several changes. The fenders were shaped in such a way that mud flung by the wheel could exit from the sides rather than clog.