 The naming ceremony for moscovium, tennessine, and oganesson was held in March 2017 at the Russian Academy of Sciences in Moscow; a separate ceremony for tennessine alone had been held at ORNL in January 2017.No properties of tennessine or its compounds have been measured; this is due to its extremely limited and expensive production and the fact that it decays very quickly.Properties of tennessine remain unknown and only predictions are available.