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18 Cards in this Set
- Front
- Back
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Nucleon Number |
Number of protons and neutrons in a nucleus |
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Charge of a Proton |
+1.60x10^-19 |
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Charge of an Electron |
-1.60x10^-19 |
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Charge of a Neutron |
0 |
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Mass of a Proton |
1.67x10^-27 |
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Mass of a Neutron |
1.67x10^-27 |
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Mass of an Electron |
9.11x10^-31 (0.511) |
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Isotope |
An atom with the same number of protons and a different number of neutrons. |
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Specific Charge |
Charge ---------- Mass |
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Stable isotope |
Nuclei that does not disintergrate as strong nuclear force is holding it together |
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Strong nuclear force |
Force that overcomes the electrostatic force of repulsion between the protons in the nucleus and keeps the protons and neutrons together. between protons protons,neutrons neutrons proton neutrons |
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The range of storng nuclear force |
3-4 femtometers. It has an attractive force down to 0.5 fm. at separations smaller than this, it is a repulsive force that acts to prevent neutrons and protons eing pushed into each other |
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Alpha Radiation |
The atomic mass decreases by 4 and the atomic number decreases by 2 |
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Beta raditation |
A neutron turns into a proton(as the nucleus has too many neutrons) and instantly a Beta particle(high speed electron) is emitted and an antineutrino is emitted. |
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Speed of light |
Speed of light= frequency x wavelength |
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1 nanometer |
x10^-9 |
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How charged particles emit electromagnetic waves |
When the charged particle loses energy: When the fast moving electron is stopped When an electron in a shell of an atom moves to a different shell of lower energy |
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Photon energy |
E=hf E=Energy h=Planck constant 6.63x10^-34 f= Frequency |
