Europe is a region of Earth that lies between the Arctic Ocean, the Atlantic Ocean, the Mediterranean Sea, Black Sea, the Caspian Sea, the mountains Urals and the Ural River.
nations that belong to Europe are 50:
Albania, Andorra, Armenia, Austria, Azerbaijan, Belgium, Belarus, Bosnia-Herzegovina, Bulgaria, Cyprus, City Vatican, Croatia, Denmark, Estonia, Finland, France, Georgia, Germany, Greece, Iceland, Ireland, Italy, Kazakhstan, Latvia, Liechtenstein, Lithuania, Luxembourg, Macedonia, Malta, Moldova, Montenegro, Netherlands, Norway, Poland, Portugal, Monaco, United Kingdom, Czech Republic, Romania, Russia, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, Ukraine, Hungary.
And here are some maps, in order to do your homework!
If you do a search on Europe and its nations, could be very useful for you the official site Europa.eu http://europa.eu/abc/european_countries / index_en.htm . From the map you can click on each individual state and find lots of useful information.