No Header/Title The applet doesn't show the entire periodic table in its most up-to-date form; there are at least 114 elements now known. But it's not hard to figure out where those heaviest elements fit into the table; after 5f is full, they'll fill 6d, 7p... Furthermore, there can't be that many elements left to find. For reasons I won't go into here, the theory of quantum mechanics tells us that there can't be elements whose atomic number is larger than 137.

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