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Apologia Chem M 3B
Atomic Structure, second half
| Question | Answer |
|---|---|
| the particle model of light | states that light is made up of small particles called photons |
| the wave model of light | states that light is a wave that travels much like a wave on the ocean |
| Particle/wave duality theory | the theory that light sometimes behaves as a particle and sometimes it behaves as a wave |
| crests | the high point of waves |
| troughs | the low point of waves |
| wavelength | the distance between the crests (or troughs) of a wave |
| amplitude | a measure of the height of the crests or the depths or the troughs on a wave |
| visible spectrum | the range of light wavelengths that are visible to the human eye |
| physical constant | a measurable quantity in nature that does not change |
| frequency | the number of wave crests (or troughs) that pass a given point each second |
| Hertz | unit meaning 1 per second |
| when a wavelength is large, | the frequency is small |
| when a wavelength is small, | the frequency is large |
| While we often use several of the light waves with wavelengths longer than visible light, | we do NOT frequently use any of the light waves with wavelengths shorter than visible light. |
| The energy of a light wave is directly proportional to its | frequency. |
| A light wave's wavelength is inversely related to its | energy. |
| Light with wavelengths shorter than visible light has enough energy to | kill living tissue. |
| Gamma rays and X-rays are more energetic than ultraviolet light, so they are | more dangerous to living tissue. |
| Light is an electromagnetic phenomenon, produced by the interaction of electrically charge particles, so it is often called | electromagnetic radiation. |
| Planck's constant | Joule-second |
| The rods in our eyes are sensitive mostly to | low levels of light and are not very sensitive to color. |
| The cones in our eyes respond to | certain specific energies of light. |
| Cones get tired pretty quickly, and when they have sent the same signal to the brain for a period of several seconds, | they eventually just shut off. |
| The way we perceive color is based on | the energy of the light that hits our eyes. |
| Atoms seem to emit | individual wavelengths of light. |
| Most colors we see are the result of | a range of wavelengths, not individual ones. |
| Each element produces its own | unique set of wavelengths when heated or electrified. |
| If you need to determine the atoms in a substance, one way to do so is to | heat the substance up and determine the wavelengths of light that are emitted. |
| spectrometer | a scientific instrument that can analyze the light and determine all of the individual wavelengths that make it up |
| spectroscopy | the process by which individual wavelengths of light emitted by a substance are analyzed |
| Niels Bohr | took Rutherford's planetary mode and added his own twist; suggested that there were several possible orbits that electrons could be in |
| nucleus | center of the atoms, including the neutrons and protons |
Created by:
MrsHough
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