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(4 exact duplicates found)

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5 Written Questions

4 Matching Questions

  1. When an atom loses an electron, it becomes

    A) sublimated.
    B) dissociated.
    C) ionized.
    D) an isotope.
    E) a plasma.
  2. Consider an atom of gold in which the nucleus contains 79 protons and 118 neutrons. What is its atomic number and atomic weight?

    A) The atomic number is 79, and the atomic weight is 197.
    B) The atomic number is 79, and the atomic weight is 118.
    C) The atomic number is 118, and the atomic weight is 197.
    D) The atomic number is 118, and the atomic weight is 79.
  3. The energy levels for electrons vary from one element to another.
  4. Grass (that is healthy) looks green because

    A) it emits green light and absorbs other colors.
    B) it absorbs green light and emits other colors.
    C) it transmits green light and emits other colors.
    D) it reflects green light and absorbs other colors.
  1. a C) ionized.
  2. b A) The atomic number is 79, and the atomic weight is 197.
  3. c D) it reflects green light and absorbs other colors.
  4. d True

5 Multiple Choice Questions

  1. D) reflects visible light.
  2. C) Atom 1: nucleus with 92 protons and 143 neutrons, surrounded by 92 electrons
    Atom 2: nucleus with 92 protons and 146 neutrons, surrounded by 92 electrons
  3. False
  4. B) absorbs most light.
  5. B) A molecule has additional spectral lines due to changes in its rotational and vibrational energies.

5 True/False Questions

  1. Suppose you know the frequency of a photon and the speed of light. What else can you determine about the photon?

    A) its temperature
    B) its acceleration
    C) its wavelength and energy
    D) the chemical composition of the object that emitted it
    A) 1 meter

          

  2. An isotope of fluorine has 9 protons and 10 neutrons. What are the atomic number and atomic weight of this fluorine? If we added a proton to this fluorine nucleus, would the result still be fluorine? What if we added a neutron instead? Explain.The atomic number of fluorine is equal to the number of protons, 9. The atomic weight is equal to the number of protons plus neutrons, 19. If we added a proton, it would no longer be fluorine. If we added a neutron instead, it would just be another isotope of fluorine, with atomic number 9 but atomic weight 20.

          

  3. When white light passes through a cool cloud of gas, we see

    A) visible light.
    B) infrared light.
    C) thermal radiation.
    D) an absorption line spectrum.
    E) an emission line spectrum.
    D) reflect visible light.

          

  4. What is the difference between energy and power?

    A) Power is the rate at which energy is used, so its units are a unit of energy divided by a unit of time.
    B) Power is measured in joules and energy is measured in watts.
    C) Power is used to describe energy of light, while the term energy has a broader meaning. D) There's no difference: Energy and power are different names for the same thing.
    D) it reflects green light and absorbs other colors.

          

  5. Sublimation is the process in which

    A) molecules go from the solid phase to the liquid phase.
    B) molecules go from the liquid phase to the gas phase.
    C) molecules go from the solid phase to the gas phase. D) electrons are stripped from atoms.
    E) electrons are captured by ions.
    B) absorbs most light.

          

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