Chemistry geeks rejoice! The 7th period is complete!

?? New element alert! ??

Kazuhiro Nogi / AFP / Getty Images

Four new elements have officially been added to the periodic table of elements, according to the International Union of Pure and Applied Chemistry (IUPAC).

Paramount Pictures / Via youtube.com

These elements had been going by their temporary names: ununtrium (113), ununpentium (115), ununseptium (117), and ununoctium (118).

IUPAC / Alex Kasprak / BuzzFeed

It's one thing to find evidence of an element once. But to confirm its existence, as was done here, you need to demonstrate it experimentally multiple times.

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