18^th 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