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Elementary particle

  • Thread starter rojasharma
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Sketch a diagram of the atom H-2, using the appropriate quarks and leptons. Label the particles in your diagram. I don;t knoq how to do this because my book does not have any example of this...:(
 
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Answers and Replies

279
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OK, protons and neutrons have three quarks each, up, up, down for the proton and down, down, up for the neutron. Up quarks have charge +2/3 and down quarks have charge -1/3.

H-2 has a proton and a neutron in the nucleus, and one electron in it's first shell, so you just need to represent the six quarks in the nucleus and the one electron in orbit.
 
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66
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sorry its He-2....even though i don;t have any idea how to do this....i am guessing...u and d are the quarks....(3 on top and 2 on the bottom of He). so there are 2 protons and 1 neutron...each proton will have 2 u and 1 d , neutron will have 1 u and 2 d. and lepton is electron which is 2 ...
 
279
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Helium-2 will have two protons and no neutrons then, and as I said, a proton has two up quarks and 1 down quark, also refered to as u and d yes.

The electron is a lepton yes, but does ont consist of any quarks, it is an elementary particle.

Edit: are you sure the question asks for Helium-2 though? He-2 has a very very short half life, only 3*10^-27 seconds.
 
66
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yes its written as 3 on top and 2 at the bottom of He....so this makes it He-2 right?
 
279
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No, that makes it He-3. The number of nucleons is 3, the atomic number is 2 (which is true for all isotopes of Helium). Helium-3 consists of two protons and one neutron, plus two electrons in orbit since it is an electrically neutral atom (as opposed to an ion).
 
66
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:)thanks
 
279
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Happy to help.
 

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