HP Rolls Out New Printers, 3D Scanning, Better Cloud Printing. On Thursday, HP announced 13 new printers and scanners, many of which target the small and midsize business market. This new range of printers and scanners emphasizes Web-connected printing and advanced scanning. HP's TopShot Laserjet Pro M275 can scan 3D objects.
Typically, a single bond is a sigma bond while a multiple bond is composed of one sigma bond together with pi or other bonds. A double bond has one sigma plus one pi bond, and a triple bond has one sigma plus two pi bonds.
A single bond is usually a Ï bond. Pi (Ï) bonds are weaker and are due to lateral overlap between p (or d) orbitals. A double bond between two given atoms consists of one Ï and one Ï bond, and a triple bond is one Ï and two Ï bonds. Covalent bonds are also affected by the electronegativity of the connected atoms which determines the chemical polarity of the bond.