Term
| Visible light, x-rays, and microwaves are all examples of what? |
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Definition
| Electromagnetic radiation (electromagnetic energy or radiant energy). |
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Term
| What is frequency of a wave? |
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Definition
| The number of cycles it undergoes per second. |
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| What is the unit for frequency? |
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Definition
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Definition
| The distance the wave travels during one cycle. |
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Term
| What is the unit for wavelength? |
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Definition
| Meters, nm, or angstroms (non-SI). |
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Term
| What is the equation for the speed of light? |
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Definition
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Definition
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Definition
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Term
| What is the height of the crest or depth of the trough of a wave? |
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Definition
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Term
| What is light of a single wavelength called? |
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Definition
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Term
What is light of many wavelengths called?
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Definition
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Term
| Is white light monochromatic or polychromatic? |
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Term
| Are shorter wavelengths to the left or right of the visible spectrum? |
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Definition
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Term
| Are frequencies higher or lower to the left of the visible spectrum? |
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Definition
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Term
| What does the angle of refraction depend on? |
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Definition
| The two media and the wavelength of the light. |
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Term
| What is it called when white light is separated into its componet colors when it passes through a prism? |
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Definition
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Term
| How does refraction of a light wave differ from a particle of matter? |
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Definition
| The speed of a light wave changes immediately, bending its path. The speed of a particle of matter continues to change gradually. |
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Term
| What is it called when a wave strikes the edge of an object and bends around it? |
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Definition
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Term
| What is a quantum of energy equal to? |
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Definition
| hv (h=Planck's constant and v=frequency). |
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Term
| What is the photoelectric effect? |
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Definition
| When monochromatic light of sufficient frequency shines on a metal plate, a current flows. |
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Term
| What are quantized "bundles" of energy called? |
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Definition
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Term
| What is the energy in absorbing or emitting a photon related to? What is it NOT related to? |
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Definition
| Frequency. NOT amplitude. |
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Term
| When light from electrically excited gaseous atoms passes through a slit and is refracted by a prism, what is created? |
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Definition
| A line spectrum. NOT a continuous spectrum.Ryd |
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Term
| What equation is used to predict the position and wavelength of any line in a given series? |
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Definition
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Term
| The higher the energy level, the ______ the electron's orbit is from the nucleus. |
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Definition
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Term
| The lower the electron's n value (energy), the _____ the radius of the orbit and the _____ the energy level. |
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Definition
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Term
| When an electron is in the first orbit, it is called what? |
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Definition
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Term
| If the electron is in any orbit farther from the nucleus, the atom is said to be in what? |
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Definition
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Term
| What orbit is considered the second excited state? |
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Definition
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Term
| What orbit is considered the first excited state? |
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Definition
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Term
| What happens when an atom absorbs a photon whose energy equals the difference between lower and higher energy levels? |
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Definition
| The electron moves to the outer (higher energy) orbit. |
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Term
| What happens when an atom in a higher energy level returns to a lower energy level? |
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Definition
| It emits a photon whose energy equals the difference between the two levels. |
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Term
| Why is an atomic spectrum not continuous? |
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Definition
| Because an atom's energy is not continuous. It has only certain states. |
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Term
| T or F. Electrons move in fixed, defined orbits. |
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Definition
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Term
| What are alternate forms of the same entity? |
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Definition
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Term
| What did de Broglie find? |
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Definition
| Matter behaves as though it moves in a wave. |
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Term
| What is the wave-particle duality? |
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Definition
| Energy AND matter are particulate, massive, and wavelike. |
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Term
| What states that it is impossible to know simultaneously the position and momentum for a particle? |
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Definition
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Term
| What examines the wave nature of objects on the atomic scale? |
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Definition
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Term
| What model describes an atom with specific quantities of energy that result from allowed frequencies of its electron's wavelike motion? |
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Definition
| Quantum-mechanical model. |
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Term
| What are the two central aspects of the quantum-mechanical model? |
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Definition
| Atomic orbital and the electron's probable location. |
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Term
| What is another name for "wave function?" What is it's greek symbol? |
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Definition
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Term
| What does a wave function describe? |
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Definition
It is a description of the electron's matter-wave in three dimensions.
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Term
| What is a measure of the probablility of finding the electron in some tiny volume of the atom? |
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Definition
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Term
| In an electron density diagram, the electron probablity density ________ with distance from the nucleus. |
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Definition
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Term
| What is an imaginary picture of the electron changing its position rapidly ofver time? |
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Definition
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