Amtrak provides service along the Northeast Corridor, and the city is a hub for Greyhound. More than 25 airlines serve Philadelphia International Airport, including low-cost carrier Southwest.
LINK / CITE ADD TO WORD LIST. noun. The definition of ionic bond is when a positively charged ion forms a bond with a negatively charged ions and one atom transfers electrons to another. An example of an ionic bond is the chemical compound Sodium Chloride.
In chemistry, an ionic compound is a chemical compound in which ions are held together in a structure by electrostatic forces termed ionic bonds.The positively charged ions are called cations and the negatively charged ions are called anions.n chemistry, an ionic compound is a chemical compound in which ions are held together in a structure by electrostatic forces termed ionic bonds.