 The density of tennessine is expected to be between 7.1 and 7.3 g/cm3, continuing the trend of increasing density among the halogens; that of astatine is estimated to be between 6.2 and 6.5 g/cm3.The known isotopes of tennessine, 293Ts and 294Ts, are too short-lived to allow for chemical experimentation at present.Nevertheless, many chemical properties of tennessine have been calculated.