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Beta is produced by the weak nuclear force.

  • n --> p + e- + v, decay to electron & antineutrino
  • p --> n + e+ + v, decay to positron & neutrino

The leptons do not preexist in the nucleus, their wavelength would be too long for that.

I think you are confused when you say "contain no elements". No nucleus contains elements, the nucleus is part of an atom and atoms are part of elements & compounds.

Perhaps you meant to say "contain no electrons". If so you are right, see above. The leptons (electron, positron, neutrinos) are created by a decay process mediated by the weak nuclear force.

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12y ago

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