Citizens of all countries on the both the North and South American continents are technically considered "residents of the America's," and therefore "americans" (with a small "a"). However, as it is generally applied, and understood to mean, "citizens of the United States Of America" - probably not. The term 'American,' (with a capital "A") refers to citizens of the only country on both continents which actually contains the word 'America' in it's country's official name.
Chile
Argentina is the South American country that contains the highest and lowest points in the western hemisphere.
Nicaragua is the Central American country that contains the largest body of fresh water in Central America.
Panama is the first country on the Central American isthmus. It clearly links the continents of North and South America.
James Monroe
Peru
There is no country that borders three continents.
Peru
I think it is Ecuador.
Of the European colonial powers, Belgian had the least impact on the American continents. Belgium did not establish any significant colonies in the Americas, unlike countries like Spain, Portugal, France, and England.
This depends on which side of the world you are on and what country you are in. If you are asking about the North American and South American continents, Canada is located in the North American continent.