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ps3_1994 - MIT OpenCourseWare http/ocw.mit.edu 5.80...

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MIT OpenCourseWare http://ocw.mit.edu 5.80 Small-Molecule Spectroscopy and Dynamics Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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MASSACHUSETTS INSTITUTE OF TECHNOLOGY± Chemistry 5.76 ± Spring 1994 ± Problem Set #3 1. An atom is in a (3 d ) 2 3 P 0 state. (a) List all L–S–J terms to which an electric dipole allowed transition might occur. (b) List all two-electron configurations into which electric dipole allowed transitions can occur from (3 d ) 2 3 P 0 . 2. A new superheavy element, Dk or Dreckium 1 , has recently been discovered at Berkeley. Its atomic number is 120 and it is in Group IIA of the periodic table. The following Dk I spectral lines have been observed (relative intensities in parentheses): in absorption at T = 1000K T = 2000K Emission 39511 cm 1 (0) 37474 (0) (1) 34796 (2) (4) 31176 (10) (20) 27506 (0) (0) 27228 (1) (1) 26116 (55) (110) 20179 (80) (60) (100) 19901 (1100) (1000) (2200) 19484 (1900) (2400) (7000) 19427 (900) (700) (1300) 19149 (1400) (1300) (2800) 19051 (1200) (900) (1600) ( observed but no intensity available) Additional lines observed in emission include (many others are omitted from this table) 20722 cm 1 18685 16007 12387 7327 1 Dk was independently discovered in the Soviet Union, but they call it Merdium, and, because of the peculiarities of the Cyrillic alphabet, symbolize it by Sh.
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5.76 Problem Set #3 Spring, 1994 page 2 and a group of 6 lines (listed in the main table above) with relative intensities quite di ff erent from those
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