 Flerovium is currently the heaviest element to have had its chemistry experimentally investigated . Two experiments were performed in April – May 2007 in a joint FLNR @-@ PSI collaboration aiming to study the chemistry of copernicium . The first experiment involved the reaction 242Pu ( 48Ca , 3n ) 287Fl and the second the reaction 244Pu ( 48Ca , 4n ) 288Fl : these reactions produce short @-@ lived flerovium isotopes whose copernicium daughters would then be studied . The adsorption properties of the resultant atoms on a gold surface were compared with those of radon , as it was then expected that copernicium 's full @-@ shell electron configuration would lead to noble @-@ gas like behaviour . Noble gases interact with metal surfaces very weakly , which is uncharacteristic of metals . 
