article_snippet.sent: The International Union of Pure and Applied Chemistry has also recently announced that nineteen elements have had nineteen elements atomic weights reassessed.
article_snippet.sent: Among those to have had those standard atomic weights adjusted are elements like aluminium, fluorine, arsenic, caesium, cadmium and selenium.
article_snippet.sent: While some of the atoms were found to have an average weight that was a tiny fraction greater than previously calculated, others decreased.
article_snippet.sent: Overall the total atomic weight displayed on the periodic table increased by 0.003640021 as a result of the changes.