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| What is the equation for determining the energy of a photon? |
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Definition
E = hf
E is energy J (kg·m2·s-2)
h is Planck's constant 6.626 x 10-34 J·s
f is frequency in Hz (s-1) |
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| the ejection of an electron from the surface of a metal in response to light |
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Definition
| the minimum light frequency necessary to eject an electron from a given metal |
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Definition
| states that electron energy levels are stable and discrete, corresponding to specific orbits; electrons can jump up or down between these energy levels by absorbing or emitting the exact amount of energy between the levels |
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| the difference between the mass of the unbonded nucleons and the mass of the bonded nucleons within the nucleus; the amount of mass converted to energy during nuclear fusion |
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| equation that relates energy and mass |
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Definition
E = mc2
E is energy in J (kg·m2·s-2)
m is mass in kg
c is speed of light in m/s |
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Term
| What are the kinds of radioactive decay? |
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Definition
- Alpha decay
- Beta decay (positive and negative)
- Gamma decay
- Electron capture
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Definition
the emission of an alpha particle which is a helium nucleus; interact highly with matter
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Definition
Can be subdivided into beta positive and beta negative decay
- Beta positive decay - also called positron emission, is the decay of a proton into a neutron, with emission of a positron and a neutrino
- Beta negative decay - the decay of a neutron into a proton, with emission of an electron and an antineutrino
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Definition
the emission of a gamma ray, which converts a high energy nucleus into a more stable nucleus
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Definition
the absorption of an electron from the inner shell that combines with a proton in the nucleus to form a neutron
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Definition
the rate at which the radionuclei decay is proportionate to how many are left (1st order reaction)
n = n0e-λt
n is the number of nuclei remaining
n0 is the original number of nuclei
λ is the decay constant
t is time
The n's are analogous to concentration in the equation of a first order reaction (GenChem). λ is analogous to the rate constant. |
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| How is the decay constant related to the half life? |
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Definition
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