Term
| In Bohr’s planetary model of the atom, electrons _______ the nucleus. |
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Definition
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| Einstein’s light quantum is called a __________________. |
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Definition
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Term
| The energy of a photon is proportional to its ________________. |
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Definition
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| What is the symbol for Planck’s Constant? |
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Definition
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Term
| The _________________ __________________ is the ejection of electrons from certain metals that are struck by light, reinforcing the ____________ theory of light. |
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Definition
Photoelectric Effect
Particle |
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Term
| Yes or No: Can the frequency of light be so low that the photons have insufficient energy to cause a photoelectric effect? |
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Definition
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Term
| ________________, like photons, have detectable wavelengths, can be diffracted, and undergo interference. |
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Definition
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Term
| _____________ _____________ are due to transitions of electrons between energy levels that correspond to different electron orbits. |
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Definition
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Term
| The radius of the atoms making up each element is ____________ to that element. |
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Definition
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Term
| ____________ _______________ is the study of motion in the micro world. |
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Definition
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Term
| Quantum measurements, such as momentum and position of an electron, involve fundamental _______________________. |
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Definition
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Term
| Name the singular form of quanta. |
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Definition
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Term
| What are quanta now called? |
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Definition
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Term
| Name some other objects that are “quantized.” |
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Definition
Matter – made up of quantities called atoms,
Electricity – made up of quantities of electrons. |
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Term
| Do photons have rest energy? |
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Definition
| No – they only move at one speed C (speed of light) |
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Term
| Give me an equation for Planck’s constant and explain the terms. |
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Definition
h = E/f
E: Kinetic energy of a photon
f: frequency of a photon |
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Definition
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Term
| _________________ light carries more energy than _________ light. |
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Definition
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Term
| What is the critical factor in the photoelectric effect? |
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Definition
Frequency of light
ultraviolet good
infrared poor |
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Term
| For what did Einstein receive a Nobel Prize? |
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Definition
E=hf
proportionality of Energy of light to the frequency of light. |
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Term
| Question proposed by Louis de Broglie. |
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Definition
| If waves have particle properties, do particles have wave properties? |
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Term
| What earned De Broglie a Nobel Prize in Physics? |
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Definition
| All matter can be viewed as having wave properties. |
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Term
| Highest or Lowest: Electrons normally occupy the ___________ energy levels available. |
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Definition
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Term
| List a way an electron can be boosted to a higher energy level in an atom. |
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Definition
1. Gas discharge tubes (neon signs)
2. Electric current – current boosts the electron to a higher level.
When the electron returns to the lower level it emits a photon. |
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Term
| In de Broglie’s theory each electron’s orbit is described as a ___________ ____________. |
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Definition
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Term
| In the most modern wave model of the atom, _____________ move in and out, toward and away from, the _________ in a standing wave “cloud.” |
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Definition
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Term
| What is Quantum Mechanics? |
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Definition
| Mechanics in the micro world |
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Term
| The entire structure of Quantum Mechanics is based on _____________________. |
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Definition
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Term
| What does “butterfly effect” mean? |
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Definition
| A small effect one place can amplify into very big effect elsewhere. |
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