Lots of elements are denser than osmium: atomic no. / symbol / name / density (g/cm3) 108 Hs Hassium 40.7 109 Mt Meitnerium 37.4 107 Bh Bohrium 37.1 106 Sg Seaborgium 35 105 Ds Darmstadtium 34.8 105 Db Dubnium 29. read more