1 The electron pair is equally shared, but controlled by the ligand. 2  The ligand is a lewis base, and acts as an electron pair donor. The metal is the electron acceptor and a lewis acid.  Most metals form cationic ions in solutions (electron acceptors), and participate in coordination complexes.
The United States is comprised of 50 states plus the District of Columbia. There are also five U.S. territories throughout the world: Guam, the U.S. Virgin Islands, American Samoa, Puerto Rico and the Northern Marianas Islands.
A rough count of these states would place the number of countries in the world at 201. That includes the 193 states recognized by the United Nations, as well as eight additional states. These are the Western Sahara, Taiwan, Northern Cyprus, Somaliland, South Ossetia, Transnistria, Abkhazia, and Nagorno-Karabakh.