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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Charge of proton |
1.6 X10^-19 C |
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Charge of electron |
-1.6 X 10^-19 C |
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Mass of proton/neutron |
1.67 X 10^-27 |
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Mass of electron |
9.11 X 10^-31 |
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What is an isotope? |
Isotopes of the same element have the same number of protons but different number of neutrons. |
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How do you calculate specific charge?what |
Charge/mass |
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What keeps the nucleus of an atom together? |
The strong nuclear force -it overcomes the repulsive electrostatic force between the protons in the nucleus |
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What does alpha particle consist of? |
= 2 protons + 2 neutron |
Helium particle |
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What happens when an unstable nucleus emits an alpha particle? |
The nucleus of the new formed elements will have a nucleon number of -4 and a proton number of -2 |
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What happens when an unstable nucleus emits beta minus particle? |
The nucleus will have the same nucleon number and proton number of +1 An anti neutrino is also emitted |
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What is the set speed of light/electromagnetic waves? |
3 X10^8 |
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How do you find the energy of a photon? |
E=hf =hc/wavelength |
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What is the number for planks constant? |
6.63 X10^-34 |
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What is rest energy of electron/positron? |
0.511 (MeV) |
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What is rest energy of proton/antiproton? |
938.26 (MeV) |
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What is rest energy of neutrons/antineutron |
938.55 |
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How do you work out the minimum energy of photon created in annihilation? |
2 X rest energy |
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What happens when two particles interact? |
They exert equal and opposite forces on each other and exchange momentum A virtual particle would exist for a moment to facilitate the exchange |
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What force is responsible for the pion exchange? |
Strong |
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What force is responsible for the W Bosons exchange? |
Weak nuclear force |
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