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How do you know if a particle is an electron/proton?

  1. May 14, 2007 #1
    im sure its a simple question but i dont know thanks
  2. jcsd
  3. May 14, 2007 #2


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    If you know it's either a proton or an electron (but no other kind of particle), then all you need to do is measure its charge, or its mass.

    - Warren
  4. May 14, 2007 #3
    Hmm.. as a real life experiment?

    Magnetic fields and electric fields can do this very easily.

    If you apply an electric field, a proton will go in the direction of electric field lines, and an electron will go the reverse.

    Magnetic fields: right hand rule.

    Otherwise, chroot is right. Electrons have negative charge. Protons have positive. A proton weighs more than an electron.
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