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30 Cards in this Set
- Front
- Back
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The proper relationship of wavelength (8) to light energy (E) is:
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a. increased wavelength correlates to increased energy
b. increased wavelength correlates to decreased energy c. wavelength is independent of energy d. wavelength is independent of frequency |
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A proper expression for the relationship between light energy (E) and wavelength (8), where c is the speed of light in a vacuum and h is Plank's constant, is:
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a. E=hc
b. 8=Ehc c. 8=hc/E d. E=8/hc |
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When an electron in an atom moves from a lower energy state to a higher energy state, the electron will
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a. absorb energy, only
b. release energy, only c. both absorb and release energy d. neither absorbs nor release energy |
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What causes the emission of radiant energy that produces characteristic spectral lines?
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a. neutron absorption by the nucleus
b. gamma ray emission from the nucleus c. movement of electrons to higher energy levels d. return of electrons to lower energy levels |
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The characteristic bright-line spectrum of an element is produced when electrons
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a. absorb quanta and return to lower energy levels
b. absorb quanta and move to higher energy levels c. release quanta and return to lower energy levels d. release quanta and move to higher energy levels. |
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The light produced by signs using neon gas results form electrons that are
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a. moving from a higher to a lower principal energy level
b. moving from a lower to a higher principal energy level c. being lost by the Ne(g) atoms d. being gained by the Ne(g) atoms |
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During a flame test, ions of a specific metal are heated in the flame of a gas burner. A characteristic color of light is emitted by these ions in the flame when the electrons
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a. gain energy as they return to lower energy levels
b. gain energy as they move to higher energy levels c. emit energy as they return to lower energy levels d. emit energy as they move to higher energy levels |
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What type of radiation has neither mass nor charge?
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a. gamma
b. neutron c. alpha d. beta |
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1. Which color visual light has the highest frequency?
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a. green
b. red c yellow d. blue e. violet |
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2. Which color of light has the lowest frequency?
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a. green
b. red c. yellow d. blue e. violet |
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Of the particles listed here, which is most involved with quantum theory?
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a. electron
b. proton c. neutron d. nucleus e quark |
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The color of light emitted by an atom is most related to
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a. energy release by the electron
b. mass of the electron c. potential energy of the electron in the ground state d. size of the electron e. strength of charge on the electron |
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1. From the above graphs, describe the relationship between energy, wavelength, and frequency.
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a. as the wavelength increases, the frequency and energy decrease
b. as the frequency increases, the wavelength and energy decrease c. as the energy increases, the frequency and wavelength decrease d. as the energy increases, the frequency and wavelength increase |
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2. From the above graphs, describe how you could increase the energy of light the most.
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a. increase the wavelength
b. decrease the wavelength c. decrease the frequency d. increase the wavelength while decreasing the frequency |
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1. The electromagnetic spectrum shows the relationship between:
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a. the mass of light and its force
b. the forces caused by light and the wavelength c. the amount of energy and wavelength d. the electrical power and strength of energy e. gamma and radio waves only |
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Which of the following occurs as energy of electromagnetic radiation increases ?
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a. wavelength increases
b. wavelength decreases c. frequency increases d. frequency decreases e. both b and d are correct |
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When an excited electron drops from the 4th orbital to the 2nd orbital, a photon that exhibits the color green. What would the color be of a photon emitted when an electron drops from the 3rd to the 2nd orbital ?
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a. blue
b. green c. purple d. yellow e. white |
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Over a period of time Uranium decays to Lead. What would account for this change?
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a. Uranium is a metal
b. Lead has an atomic weight of 208. c. Uranium decays through alpha emission d. Uranium becomes excited and loses electrons e. It is impossible for an element to change to another element. |
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Over a period of time Bismuth decays to Polonium. What would account for this change?
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a. Bismuth is a metal
b. Polonium has an atomic mass of 84. c. Bismuth decays through beta emission. d. Bismuth ionizes and loses 2 protons e. One element cannot change to another |
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The isotope Np-238 has a half-life of 2.0 days. If 84 grams are produced on Monday, how much will be remaining 4.0 days latter?
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a. 18 grams.
b. 21 grams. c. 35 grams. d. 42 grams. e. 84 grams. |
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The isotope Np‑238 has a half‑life of 2.0 days. If 96 grams are produced on Monday, how much will be remaining 6.0 days latter?
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a. 8 grams.
b. 12 grams. c. 24 grams. d. 48 grams. e. 96 grams. |
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The half-life of is 8.07 days. What fraction of a sample of remains after 24.21 days?
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a. 1/2
b. 1/4 c. 1/8 d. 1/16 |
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The half-life of a radioactive substance is 2.5 minutes. What fraction of the original radioactive substance remains after 10 minutes?
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a. 1/2
b. 1/4 c. 1/8 d. 1/16 |
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As a sample of the radioactive isotope decays, its half-life
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a. decreases
b. increases c. remains the same |
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Which type of radiation is most similar to high-energy x rays?
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a. alpha
b. beta c. neutron d. gamma |
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Which type of radiation has zero mass and zero charge?
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a. alpha
b. beta c. neutron d. gamma |
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Which type of radiation continues in a straight line when passed through an electric field?
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a. alpha
b. beta c. gamma d. proton |
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Which product of nuclear decay has mass but no charge?
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a. alpha particles
b. neutrons c. gamma rays d. beta positrons |
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Which type of emission has the highest penetrating power?
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a. alpha
b. beta c. positron d. gamma |
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Which of the following reactions would you expect to produce the most energy?
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a. H+ + OH- H2O (combination of a strong acid and a strong base)
b. 2H2 + O2 2H2O (combustion of hydrogen gas) c. C12H24 + 18O2 12CO2 +12H2O (combustion of a large hydrocarbon) d. 2H + 3H 4He + neutron (nuclear fusion of two hydrogen isotopes) |
