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| the wide range of infrared radiation frequencies which are emitted by a hot body |
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| directly dependent on temperature and is measures in kelvins |
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| as temperature increases, the frequency at which max energy is emitted |
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| power emitted by a hot body increases with |
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| exists only in bundles of specific amounts |
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| who assumed that the vibrational energy of the atoms in a solid could only have certain frequencies |
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| who proposed that atoms emit radiation only when their vibrational energy changes |
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| they suggested that newtonian physics only worked under certain conditions |
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| Why were Planck's theories troubling to other physicists and himself? |
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| the emission of electrons when em radiation falls on an object |
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| the minimum value at which the frequency of radiation causes the ejection of electrons |
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| the energy needed to free the most weakly bound electron from a metal |
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| the shift in energy and momentum of scattered electrons |
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| who found that the energy and momentum gained by the electrons is __________ the energy and momentum lost by the photons |
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| particles such as nucleons should show wave like properties |
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Definition
| DeBrogile's wavelength formula showed that |
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| Heisenberg Uncertainty Principle |
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| it is impossible to know the position and momentum of a particle at the same time |
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| a massive positively charged particle that moves at high speeeds |
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| how do we know the composition of the sun |
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| it didn't agree with the laws of electromagnetism |
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| what was wrong with Rutherford's planetary model |
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| the quantized amount of energy that an atom may have in each level |
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| the state of an atom with the smallest allowable amount of energy |
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| an energy level of an atom that is higher than its ground state |
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| the symbol for the principle quantized number which determines the quantized value for the radius and energy of an atom |
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| it only worked for hydrogen |
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| what was the problem with bohr's improved planetary model |
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| the probability that an electron is in a specific region |
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| what does Schroedinger's quantum model predict |
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| the region that contains a high probability of containing an electron |
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| the study of properties of matter using its wave properties |
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| light with waves that are in-step and are highly concentrated and powerful due to superposition |
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| thermal excitation, electron collision, and photon collision |
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| light amplified by simulated emission of radiation |
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| who discovered radioactivity |
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| symbol for the number of protons |
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| symbol for the number of protons and neutrons in the nucleus |
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| the nucleus of an isotope |
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| all nuclides have the same number of __________ ,but different numbers of __________ |
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| holds the nucleus together |
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| the nucleus has less energy to the nucleons |
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| why is binding energy always negative |
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| the difference between the mass of the nucleons and the actual mass |
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| a natural process in which a material emits penetrating rays so they can move to a more stable form |
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| alpha decay can be stopped by |
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| beta particles can be stopped by |
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| several feet of concrete or several inches of lead |
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| gamma particles can be stopped by |
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| alpha change in atomic number |
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| beta change in atomic number |
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| alpha change in mass number |
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| a nuclear reaction occurs whenever the number of _________ changes |
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| the time required for half of the atoms in a quantity of radioactive isotope to decay |
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| the decay rate or the number of decays per second of a radioactive substance |
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| artificially produced isotopes which are formed from stable isotopes through bombardment with particles, protons, neutrons, gamma rays or electrons |
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| the splitting of heavy nuclei |
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| the joining together of heavy nuclei |
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| only occurs at high temperatures |
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| a device in which particle beams collide in several areas and the results are studied |
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