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UNDATED (CNN) - When setting the periodic table, leave room for an extra element.

Researchers in Sweden say they've made one by slamming together the atoms of calcium and emeritium, and it's a beast.

Its atomic number is 115, much heavier than lead or uranium. Its temporary name is "ununpentium".

But you can't see it. Right after the atoms collided, the element disappeared in a flash of radiation. You can't find it as it doesn't exist in nature. Swedish scientists can't say they invented it, Russian researchers first made this element in 2004. And you can't really do anything with it, they say it's just not practical.

Some folks may be "elementally" confused about why we should care at all. Well researchers said it did confirm that the 2004 study created a new element, even for just a moment.

Scientists hope that one day experiments like these could lead to the lasting creation of a new usable element.

And if ununpentium is approved by a committee combining members of the International Union of Pure and Applied Chemistry and the International of Pure and Applied Physics, it could change the periodic table as we know it.

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