Which mountain range runs through the country of Romania?

What is the name of the mountain range that runs along the border between Italy and Slovenia? Which mountain range forms the border between Poland and the Czech Republic? Which mountain range runs through the Scandinavian Peninsula? Which mountain range runs through the state of Montana in the United States? Which mountain range runs through the country of Morocco? What is the world's longest continental mountain range? What is the major mountain range in South Korea? Which mountain range runs along the border between Poland and Slovakia?