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.
If night riding is unavoidable, wear reflective clothing (found in bike shops) and use bicycle headlights and rear lights. For riding at any time, the National Safety Council advises equipping your bike with front, rear and spoke reflectors, pedal reflectors, a horn or bell and a rearview mirror.