Is Xe6s24f1 in the excited state?

Yes, the electron configuration Xe6s²4f¹ indicates that the atom is in an excited state. The presence of an electron in the 4f subshell suggests that one of the electrons from the filled 6s subshell has been promoted to a higher energy level, which characterizes an excited state. In its ground state, xenon would have all its electrons in the lowest available energy levels.