# Fill in the hyphenated blank:

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A _______ -_______ condensate is a group of atoms cooled to within a hair of absolute zero. When they reach that temperature the atoms are hardly moving relative to each other; they have almost no free energy to do so. At that point, the atoms begin to clump together, and enter the same energy states. They become identical, from a physical point of view, and the whole group starts behaving as though it were a single atom.

posted Dec 13, 2016

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It's called the Bose-Einstein Condensate.

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