 The closed @-@ shell electron configuration of flerovium results in the metallic bonding in metallic flerovium being weaker than in the preceding and following elements ; thus , flerovium is expected to have a low boiling point , and has recently been suggested to be possibly a gaseous metal . The melting and boiling points of flerovium are predicted to be around 70 ° C and 150 ° C , significantly lower than the values for the lighter group 14 elements ( those of lead are 327 ° C and 1749 ° C respectively ) , and continuing the trend of decreasing boiling points down the group . Although earlier studies predicted a boiling point of ~ 1000 ° C or 2840 ° C , this is now considered unlikely because of the expected weak metallic bonding in flerovium and that group trends would expect flerovium to have a low sublimation enthalpy . In the solid state , flerovium is expected to be a dense metal due to its high atomic weight , with a density variously predicted to be either 22 g · cm − 3 or 14 g · cm − 3 . The electron of the hydrogen @-@ like flerovium ion ( oxidized so that it only has one electron , Fl113 + ) is expected to move so fast that it has a mass 1 @.@ 79 times that of a stationary electron , due to relativistic effects . For comparison , the figures for hydrogen @-@ like lead and tin are expected to be 1 @.@ 25 and 1 @.@ 073 respectively . Flerovium would form weaker metal – metal bonds than lead and would be adsorbed less on surfaces . 
