The Grotrian diagram in Figure 22.7 shows a number of allowed electronic transitions for He. Which of

Question:

The Grotrian diagram in Figure 22.7 shows a number of allowed electronic transitions for He. Which of the following transitions shows multiple spectral peaks due to a splitting of terms into levels? How many peaks are observed in each case? Are any of the following transitions between energy levels forbidden by the selection rules?

a. 1s2 1S †’ 1s2p 1P

b. 1s2p 1P †’ 1s3s 1S

c. 1s2s 3S †’ 1s2p 3P

d. 1s2p 3P †’ 1s3d 3D

Figure 22.7

Singlets Triplets 1s 35 3D lonization limit 24 - 1s4p 1s4d -1s4d - 1s4p -1s4s 1s4s -1s3p 1s3d 1s3d -1s3p 23 1s3s 1s3s, 2

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Physical Chemistry

ISBN: 978-0321812001

3rd edition

Authors: Thomas Engel, Philip Reid

Question Posted: