Metals combine with nonmetals to give ionic compounds. When naming binary ionic compounds, name the cation first (specifying the charge, if necessary), then the nonmetal anion (element stem + -ide).
Port authority. For other uses, see Port authority (disambiguation). In Canada and the United States, port authority (less commonly a port district) is a governmental or quasi-governmental public authority for a special-purpose district usually formed by a legislative body (or bodies) to operate ports and other transportation infrastructure. Most port authorities are financially self-supporting.
Port security in the United States. In the United States, port security is handled jointly by the Coast Guard and U.S. Customs and Border Protection, both components of the Department of Homeland Security. Local law enforcement agencies and the FBI also have a role in port security at the local and regional level.