This is all the Data that is given. Low-pressure sodium lamps, based on sodium s

Question

This is all the Data that is given.

Low-pressure sodium lamps, based on sodium spectroscopic transitions, are commonly used for outdoor lighting applications. The light emitted by these lamps appears yellow. 2. What is the ground electronic configuration for sodium and what atomic term symbols arise from this configuration? The lowest energy excited states arise from promotion of one electron to higher lying states. What are the three lowest energy excited state configurations for sodium? What atomic term symbols arise from these configurations? A common way to think about atomic spectroscopy enlists the Grotrian diagram, which shows the energy levels for the various atomic states. Find a Grotrian diagram for sodium (online, in a book, etc.) and indicate the ground state and three lowest excited states of sodium. a. b. c. d. Indicate the transition(s) you think are responsible for the light emitted by the sodium vapor lamps on the Grotrian diagram. Explain how these transitions agree with the atomic selection rules, AL-+1; AS,-0; /-0± l (except/-0 to Je0 is not allowed) Energy levels indicated on any Grotrian diagram do not exceed a highest level. In sodium, the maximum energy level is 41449.451 cm . To what does the highest level correspond? e.

Explanation / Answer

a) Electronic configuration of Sodium is [Ne] 3s1

The atomic term symbol is 2S1/2

b) Excitation of sodium promotes one valence electron into the 3p orbital. There are two.closely spaced levels in the excited term of sodium with term symbols 2P1/2 and 2P3/2

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