What international body of chemists has decided the name of 6 new elements?

The names were granted by IUPAC

The International Union of Pure and Applied Chemistry (IUPAC) is an international, non-governmental organization whose purpose is to address issues in the chemical sciences.  Every element that is newly discovered or synthesized in lab is checked and regulated by IUPAC and then it is named . Names that follow IUPAC rules are known as systematic names, or IUPAC names. IUPAC is also responsible for the nomenclature of elements.

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