18th Group

  • Default:He, Ne, Ar, Kr, Xe, Rd

  • Molecules: 0 bond is accepted.

    • Exceptions: The following xenon compounds are accepted: XeF2, XeF4, XeF6, XeO3, XeO4 XeOF4, XeO2F2, XeO3F2.

  • Ions: 0 charge is accepted

  • Radicals: 0 radical is accepted