• University of British Columbia

• CHEM 211

nstructions: Answer the following six questions (pg. 1–4). DUE DATE: October 30, 11:59 pm. Submit all answers online through Canvas prior to the due date. Late submissions will receive a grade of zero. Total marks: 20 Question 1 [6 marks] Match the following terms with the definitions below. Input your answers on Canvas [each correct answer is worth 0.25 marks]. Use definitions once only. Note: the terms and definitions will be randomized on Canvas. Terms  Absorbance  Absorption line width  Atomic absorption spectroscopy  Chromophore  Deuterium lamp  Diffraction grating  Double beam design  Double monochromator  HOMO-LUMO  Fluorescence  Groove density  Hollow cathode lamp  Infrared light  Molar absorption coefficient  Pre-mix burner  Photodiode array  Photomultiplier tube  Photoselection principle  Quartz  Resonance  Rotational transitions  Slit width  Tungsten-halogen lamp  Visible light Correct Definitions (in the same order as the columns of the list of terms)  Log scale measurement of the amount of light transmitted through a sample.  Important difference between molecular and atomic absorption spectroscopy.  Method of elemental analysis.  Group of atoms in a molecule where the electronic transition responsible for an absorption band is localized.  Common spectrophotometer light source for ultraviolet wavelengths.  Most common dispersive element used in monochromators.  Spectrophotometer design that offers superior signal-to-noise ratio and precision.  Arrangement of components that follows slit  grating  slit  grating  slit.  Electronic transition in a molecule that corresponds to the S0 S1 transition. This study source was downloaded by 100000874405579 from CourseHero.com on 11-20-2023 14:52:35 GMT -06:00 https://www.coursehero.com/file/35660470/CHEM211-2018-Problem-Set3-Answer/  Mechanism through which a molecule loses some or all of its excitation energy (after photon absorption) via emission of a photon.  Parameter that determines the dispersion of a diffraction grating.  Common light source for atomic absorption spectroscopy.  Light that induces vibration transitions in molecules.  Measure of the probability that a molecule will absorb a photon of a certain wavelength.  Sampling device for atomic absorption spectroscopy that is used with liquids.  Detector technology that can be used to measure an absorption spectrum without scanning a monochromator.  Type of amplified photodetector.  Condition that the electric field or polarization of the photon should align with a transition dipole for a molecule to absorb that photon.  Material used to construct sample cells suitable for measuring absorption of ultraviolet light.  Condition for absorption of radiation wherein the energy of the photon matches the energy of the transition induced.  Type of transitions that are generally omi