Masses of superheavy elements nihonium and moscovium measured

An image of Nihonium and Moscovium

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First direct measurement made by US team

The atomic masses of elements 113 and 115 – nihonium and moscovium – have been measured directly for the first time by researchers at the US Department of Energy’s Lawrence Berkeley National Laboratory using an instrument called Fiona (For the Identification Of Nuclide A).