1 3s2.3p4 3 P 2.0 0.0 0.0 2 3s2.3p4 3 P 1.0 396.1 339.0 3 3s2.3p4 3 P 0.0 573.6 495.0 4 3s2.3p4 1 D 2.0 9238.6 9213.0 5 3s2.3p4 1 S 0.0 22180.0 22182.0 -1 Observed energies: Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2012). NIST Atomic Spectra Database (ver. 5.0), [Online]. Available: http://physics.nist.gov/asd [2013, May 3]. National Institute of Standards and Technology, Gaithersburg, MD. Theoretical energies from O. Zatsarinny and K. Bartschat, J. Phys. B: 39, 2861 (2006). Produced for the CHIANTI database by Giulio Del Zanna, Jul 2016 -1