It was once attached to North America.
It was a part of the continent of North America, Greenland has now been associated with Europe.
It has belonged to Europe for almost a millennium by first Norway, now being Denmark
America was actually once connected to Australia.
Pangaea
Africa
If put together, they would fit perfectly into one huge super continent like a puzzle.
Pangaea was a supercontinent that existed about 335 million years ago, and it included almost all of Earth's landmasses joined together. It had a distinctive single landmass configuration, with some of the current continents as we know them today joined into one large landmass.
A super continent called Pangaea.
From Iceland the Greenland, then back to Iceland. Then once more back to Greenland.
The supercontinent that all continents were once joined to is called Pangaea. It existed during the late Paleozoic and early Mesozoic eras before breaking apart into the continents we know today.
Yes, Africa and Australia were once part of the supercontinent called Gondwana, which existed during the Paleozoic and Mesozoic eras. Over millions of years, the breakup of Gondwana led to the separation of Africa and Australia to their current positions.
The first place to look for the closest country would be to know which continent Chile is located in, which is South America. Once you know the continent, this eliminates hundreds of other options. There are several countries that are relatively close (within 2000 KM), but Argentina is the closest.