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Question
A free neutron decays into ______.
Options
A proton, a positron and a antineutrino
A proton, an electron, and an antineutrino
A proton, a positron and a neutrino
A proton, an electron and a neutrino
MCQ
Fill in the Blanks
Solution
A free neutron decays into a proton, an electron, and an antineutrino.
Explanation:
Free neutrons are unstable. A free neutron (n0) decays into a proton (p+), an electron (e−), and an electron antineutrino `(barnu_"e")`. This phenomenon is called beta decay.
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Radioactivity - Beta Decay
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