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CaOHC Final Exam (2024) || With Questions & Answers (Graded A+) CaOHC Final Exam (2024) || With Questions & Answers (Graded A+) Why is the CaOH spectrum in figure 8-8 much broader than the sodium emission line? - ANSWER - -CaOH is ionic and it can have both (vibrational ↔ rotational states) w...

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  • August 8, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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2024




CaOHC Final Exam (2024) || With Questions
& Answers (Graded A+)




Conceptial Researchers


, CaOHC Final Exam (2024) || With Questions &
Answers (Graded A+)
Why is the CaOH spectrum in figure 8-8 much broader than the sodium emission line? - ANSWER - -
CaOH is ionic and it can have both (vibrational ↔ rotational states) which leads to broader emission
lines

-Since Na is a single element its unable to to exhibit these lines



What is resonance fluorescence? - ANSWER - emitted radiation is of the same wavelength as the
radiation and can be used to excite the fluorescence



Under what conditions could a strokes shift occur? - ANSWER - when an excite atom goes from an
excited state to a lower energy state and fluoresces longer than the wavelength =



What determines natural line widths for atomic emission and absorption lines? - ANSWER - -lifetime of
an excited state

- 10^-5 nm or 10^-4Å



In a hot flame, the emission intensities of the sodium lines at 589.0 and 589.6 nm are greater in a sample
solution that contains KCl than when this compound is absent. Suggest an explanation. - ANSWER -
ionization is suppressed by the high conc of the potassium and that means that there are more sodium
atoms --> so emission intensities will increase.



The intensity of a line for atomic Li is much lower in a natural gas flame, which operates at 1800°C, than
in a hydrogen-oxygen flame, whose temperature is 2700°C. Explain. - ANSWER - -Higher Temp results in a
higher # of EXCITED ELECTRONS

- the more excited the greater the # of particles and emissions



Name a continuous type of atomizer that are used in atomic spectroscopy - ANSWER - inductively
coupled plasma

where signal = CONSTANT

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