Ch.4 Study Guide Chemistry

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Ch.4 Study Guide Chemistry
2010-10-12 01:26:01

walnut high
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  1. Light has properties of both _____________ & ______________
    waves; particles
  2. What is the speed of light?
    3.0 x 108 m/s (300,000,000 m/s)
  3. Order of magnetic spectrum from least radiation and longest wavelengths to the most radiation and the shortest wavelengths
    Radio, TV, Microwaves, Infrared(Heat Lamp), Visible, UV x-rays, Gamma rays
  4. Microwaves have shorter waves than (X-Rays, radio waves, UV light or gamma rays)
    Radio waves
  5. A heat lamp produces (infrared, radio waves, X-rays or microwave) radiation.
  6. Amplitude determines the ___________ of light.
    Brightness / Intensity
  7. How is amplitude measured?
    Height of wave
  8. What is the distance between successive waves of a crest called?
  9. What is frequency?
    How fast a wave oscillates up and down through a fixed point in a given time.
  10. What color has the highest frequency in visible light?
  11. What are quanta? Who proposed the idea of quanta?
    Fundamental "pieces" of energy; Plancks
  12. What are packets of energy or light called? Who proposed the idea of this?
    Photons; Einstein
  13. Who explained the Photoelectric Effect? What is the Photoelectric Effect?

    When a photon strikes the surface of a metal, it transfers its energy to an electron in a metal atom. Electrons are ejected from the surface of the metal.
  14. What is an orbital?
    A region around nucleus where an electron with a given energy is likely to be found.
  15. What letter signifies an electron's principle quantum number?
  16. What does the Heisenberg principle state?
    The position and momentum of a moving object cannot be measured and known exactly. Electrons are most likely found in electron clouds or in orbitals.
  17. What does the Aufbau principle state?
    Electrons are added to the lowest energy orbital first.
  18. How did Bohr label energy levels?
    By Quantum number (n)
  19. Which scientist labeled each energy level in his atomic model by a quantum number?