A series of lines in the spectrum of neutral Li atoms rise from transitions between 1s2 2p1 2P1s 2 2p


A series of lines in the spectrum of neutral Li atoms rise from transitions between 1s2 2p1 2P1s 2 2p 12 and 1s2nd1 2D1s 2 nd 12 D and occur at 610.36 nm, 460.29 nm, and 413.23 nm. The d orbitals are hydrogenic. It is known that the transition from the 2P 2 P to the 2S 2 S term (which arises from the ground-state configuration 1s22s1)1s 2 2s 1 ) occurs at 670.78 nm.
Calculate the ionization energy of the ground-state atom.


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