Concept explainers
(a)
Interpretation:
The individual transitions that are allowed for
Concept introduction:
The change in energy
The value of
(b)
Interpretation:
The unique spectral lines having different energy which are allowed for
Concept introduction:
The change in energy
The value of
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Physical Chemistry
- The following are sets of rotational quantum numbers (J,MJ,K). Label each indicated transition as either allowed or forbidden. Hint: Remember the rules for allowed values of the various quantum numbers. a (5,4,0)(3,6,0)b (8,2,2)(9,2,2) c (7,4,2)(7,4,2)d (4,2,5)(3,2,5)arrow_forwardWhat is the difference between continuous and discrete spectra?arrow_forwardThe following are sets of rotational quantum numbers (J,MJ,K). Label each indicated transition as either allowed or forbidden. Hint: Remember the rules for allowed values of the various quatum numbers. a (0,0,0)(1,1,0)b (0,0,0)(1,0,0) c (3,2,1)(3,1,1)d (4,4,1)(2,4,1)arrow_forward
- What is a rotating frame of reference?arrow_forwardWhat is the physical explanation of the difference between a particle having the 3-D rotational wavefunction 3,2 and an identical particle having the wavefunction 3,2?arrow_forwardConsider the following transitions 1. n=3 to n=1 2. n=2 to n=33. n=4 to n=34. n=3 to n=5(a) For which of the transitions is energy absorbed? (b) For which of the transitions is energy emitted? (c) Which transitions involve the ground state? (d) Which transition absorbs the most energy? (e) Which transition emits the most energy?arrow_forward
- Explain why X-ray lasers would be extremely difficult to build.arrow_forwardSingle atoms only undergo electronic transitions. True Falsearrow_forwardUse the Tanabe-Sugano diagram to indicate the electronic transitions for the configurations below, i.e. for example, 'A2 →³T2 is one transition for ³F. (a) d³ (b) dºarrow_forward
- (1) Which more closely resembles an absorption spectrum, an emission or an excitation spectrum? (2) What is the difference between fluorescence and phosphorescence? (3) Define quantum yield?arrow_forwardAtomic absorption spectrophotometry is a method for the quantitative determination of metal ions. a) Describe in detail the AAS instrument and especially the parts that differ from a normal spectrophotometer. b) What light source is used in this technology and how does it work? c) What interferences can occur with this equipment? d) What is the theoretical basis of the AAS method?arrow_forwardConsider the three electronic transitions in a hydrogen atomshown here, labeled A, B, and C.(a) Three electromagnetic waves, all drawn on the samescale, are also shown. Each corresponds to one of thetransitions. Which electromagnetic wave (i), (ii), or (iii),is associated with electronic transition C?arrow_forward
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