article: Extended periodic table
links: IUPAC Oxygen Untriquadium Untrioctium Technetium Untriseptium Chemical element Untritrium Untribium Copernicium Unseptbium Untrinilium Untrihexium Unsepttrium Island of stability Unbioctium Chemistry Untriunium Unbiseptium Roentgenium Untriennium