We’ve Officially Got Four New Elements
Chemistry geeks rejoice! The 7th period is complete!
?? New element alert! ??
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Four new elements have officially been added to the periodic table of elements, according to the International Union of Pure and Applied Chemistry (IUPAC).
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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.