A series of lines in the spectrum of neutral Li atoms rise from combinations of 1s22p12p with 1s2nd12D and occur at 610.36nm, 460.29 nm, and 413.23 nm The d orbitals are hydrogenic. It is known that the 2p term lies at 670.78 nm above the ground state, which is 1s22s12S. Compute the ionization energy of the ground-state atom.