CH 9: Emission and absorption spectra
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Questions and Answers

What do the distinct, colored lines on a dark background in an atomic emission spectrum represent?

  • The temperature of the element
  • The pressure of the gas
  • The frequency of light emitted by the element (correct)
  • The density of the element

    • What is the primary difference between an atomic emission spectrum and an atomic absorption spectrum?

  • Emission spectra show continuous spectra with dark lines, while absorption spectra show distinct, colored lines
  • Emission spectra are used to identify elements, while absorption spectra are used to measure the temperature of the element
  • Emission spectra are used to measure the density of the element, while absorption spectra are used to identify the element
  • Emission spectra show distinct, colored lines, while absorption spectra show continuous spectra with dark lines (correct)

    • How do scientists use spectra to determine the composition of celestial objects?

  • They analyze the emission and absorption lines in the spectra to identify the elements present in the object (correct)
  • They analyze the emission lines in the spectra to determine the density of the object
  • They analyze the absorption lines in the spectra to determine the temperature of the object
  • They analyze the continuous spectrum to determine the motion of the object

    • How do greenhouse gases contribute to the greenhouse effect?

    <p>They absorb specific infrared wavelengths, which are then re-emitted, warming the atmosphere</p> Signup and view all the answers

    What is the primary purpose of studying atomic spectra in the classroom?

    <p>To explore how emission and absorption spectra are generated and apply this knowledge to real-world scenarios</p> Signup and view all the answers

    What type of spectrum is characterized by distinct colored lines against a dark background?

    <p>Atomic Emission Spectrum</p> Signup and view all the answers

    How is an atomic absorption spectrum formed?

    <p>By absorbing specific frequencies of incoming light</p> Signup and view all the answers

    What do the dark lines in a continuous spectrum indicate?

    <p>Frequencies absorbed by the substance</p> Signup and view all the answers

    Which type of spectrum shows all colors or wavelengths without interruption?

    <p>Continuous Emission Spectrum</p> Signup and view all the answers

    What causes the production of an atomic emission spectrum of an element?

    <p>Excited electrons making transitions from higher to lower energy levels</p> Signup and view all the answers

    What happens when atoms are excited in terms of their electrons?

    <p>Electrons jump to higher energy levels</p> Signup and view all the answers

    What characterizes an atomic emission spectrum?

    <p>Distinct colored lines against a dark background</p> Signup and view all the answers

    What do dark lines in a continuous spectrum indicate?

    <p>Absorbed frequencies</p> Signup and view all the answers

    Which type of spectrum is produced when excited electrons in atoms transition from higher to lower energy levels?

    <p>Atomic emission spectrum</p> Signup and view all the answers

    What is the primary cause of the formation of an atomic absorption spectrum?

    <p>Excitation of electrons to higher energy states</p> Signup and view all the answers

    Which type of spectrum shows a complete range of colors without distinct lines or gaps?

    <p>Continuous spectrum</p> Signup and view all the answers

    In an atomic absorption spectrum, what do the dark lines correspond to?

    <p>Frequencies absorbed by the substance</p> Signup and view all the answers

    What distinguishes the distinct colored lines on a dark background in an atomic emission spectrum?

    <p>Specific frequencies of light released by electrons</p> Signup and view all the answers

    How are atomic absorption and atomic emission spectra related?

    <p>They represent the same phenomena in reverse</p> Signup and view all the answers

    What is the significance of the unique electronic structure in the creation of emission spectra?

    <p>It determines the color of the emitted light</p> Signup and view all the answers

    Which of the following statements is true about the application of spectra in astronomy?

    <p>Both emission and absorption spectra are used to identify the composition of celestial objects.</p> Signup and view all the answers

    What is the primary reason for studying absorption spectra in environmental science?

    <p>To study the absorption of specific infrared wavelengths by greenhouse gases, contributing to global warming.</p> Signup and view all the answers

    Which of the following best describes the purpose of studying atomic spectra in the classroom?

    <p>To explore how emission and absorption spectra are generated and understand the transitions between energy levels in atoms.</p> Signup and view all the answers

    What information can be obtained from the distinct, colored lines in an atomic emission spectrum?

    <p>The presence of specific elements in the gas or plasma.</p> Signup and view all the answers

    Which of the following statements accurately describes the relationship between emission and absorption spectra for the same element?

    <p>The missing frequencies in the absorption spectrum match the frequencies found in the emission spectrum.</p> Signup and view all the answers

    What is the primary cause of the greenhouse effect on Earth?

    <p>The absorption and re-emission of infrared radiation by greenhouse gases.</p> Signup and view all the answers

    Which of the following statements accurately describes a continuous spectrum?

    <p>It shows all colors or wavelengths without interruption.</p> Signup and view all the answers

    What is the primary cause of the distinct, colored lines in an atomic emission spectrum?

    <p>The emission of light by electrons transitioning between energy levels in atoms.</p> Signup and view all the answers

    Which of the following best describes the purpose of studying spectra in astronomy?

    <p>To study the composition, temperature, density, and motion of celestial objects.</p> Signup and view all the answers

    What information can be obtained from the dark lines in an atomic absorption spectrum?

    <p>The presence of specific elements in the gas.</p> Signup and view all the answers

    What is the primary purpose of analyzing atomic emission spectra in astronomy?

    <p>To identify the elements present in celestial objects</p> Signup and view all the answers

    What is the primary mechanism that contributes to the greenhouse effect on Earth?

    <p>Absorption of infrared radiation by greenhouse gases</p> Signup and view all the answers

    What is the primary difference between an atomic emission spectrum and an atomic absorption spectrum?

    <p>Emission spectra show bright lines, while absorption spectra show dark lines</p> Signup and view all the answers

    What information can be obtained from the distinct, colored lines in an atomic emission spectrum?

    <p>The specific electronic transitions of the emitting atoms</p> Signup and view all the answers

    How do astronomers use spectra to determine the composition of celestial objects?

    <p>By matching the observed emission lines to known element signatures</p> Signup and view all the answers

    What is the primary cause of the distinct, colored lines in an atomic emission spectrum?

    <p>The emission of specific wavelengths of light by excited atoms</p> Signup and view all the answers

    What is the primary purpose of studying atomic absorption spectra in environmental science?

    <p>To determine the composition of atmospheric gases</p> Signup and view all the answers

    How are atomic emission and atomic absorption spectra related?

    <p>The dark lines in an absorption spectrum correspond to the bright lines in the emission spectrum of the same element</p> Signup and view all the answers

    What is the primary significance of the unique electronic structure of atoms in the creation of emission spectra?

    <p>It determines the specific wavelengths of light emitted by excited atoms</p> Signup and view all the answers

    What do the dark lines in an atomic absorption spectrum indicate?

    <p>The absorption of specific wavelengths of light by atoms in the ground state</p> Signup and view all the answers

    What is the primary reason for the distinct, colored lines observed in an atomic emission spectrum?

    <p>The excitation of electrons to higher energy levels and their subsequent return to lower levels, releasing specific photon energies</p> Signup and view all the answers

    What is the primary difference between an atomic emission spectrum and an atomic absorption spectrum?

    <p>Atomic emission spectra have distinct colored lines on a dark background, while atomic absorption spectra have dark lines on a continuous spectrum</p> Signup and view all the answers

    How are atomic absorption and atomic emission spectra related?

    <p>The dark lines in an atomic absorption spectrum correspond to the same frequencies found in the element's atomic emission spectrum</p> Signup and view all the answers

    What information can be obtained from the distinct, colored lines in an atomic emission spectrum?

    <p>The energy levels of the electrons in the atoms and the specific transitions they are making</p> Signup and view all the answers

    Which type of spectrum is characterized by a complete range of colors without distinct lines or gaps?

    <p>Continuous spectrum</p> Signup and view all the answers

    How do scientists use spectra to determine the composition of celestial objects?

    <p>By analyzing the distinct, colored lines in the emission spectra of celestial objects, which correspond to the unique electronic structures of the elements present</p> Signup and view all the answers

    What is the primary cause of the formation of an atomic absorption spectrum?

    <p>The absorption of specific frequencies of incoming light by atoms</p> Signup and view all the answers

    What is the primary purpose of studying atomic spectra in the classroom?

    <p>To understand the electronic structure and energy transitions of atoms</p> Signup and view all the answers

    Which of the following statements accurately describes the relationship between emission and absorption spectra for the same element?

    <p>The dark lines in an absorption spectrum correspond to the same frequencies found in the element's emission spectrum</p> Signup and view all the answers

    What is the primary cause of the greenhouse effect on Earth?

    <p>The absorption of specific wavelengths of light by greenhouse gases in the atmosphere</p> Signup and view all the answers

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