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.
A covalent bond is a chemical bond between two nonmetals (two metals cannot covalently bond) in which electrons are shared, while an ionic bond is a chemical bond between a me â¦ tal and a non metal due to the attraction between oppositely charged ions.or example water is H2O. Oxygen needs two more electrons to have a full valence (â¦ outer shell) and each hydrogen needs one electron, so they share electrons to form the stable compound water. An ionic bond is a bond between a metal and a nonmetal, where there is an exchange of electrons.