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