What countries are bordered by the second largest mountain range in Europe? 
Carpathian Mountains: The Carpathian Mountains or Carpathians ( ) are a mountain range system forming an arc roughly 1500 km long across Central and Eastern Europe, making them the second-longest mountain range in Europe (after the Scandinavian Mountains, 1700 km ). Scandinavian Mountains:  To the north they form the border between Norway and Sweden, still reaching 2,000 m high (6,600 ft) at the Arctic Circle.
Norway and Sweden