Question

A free neutron decays spontaneously into

• A. a proton, an electron and anti-neutrino
• B. a proton, an electron and a neutrino
• C. a proton and electron
• D. a proton, and electron, a neutrino and an anti-neutrino

Answer 1

Answer: (A)

a proton, an electron and anti-neutrino

Answer 2

$n\to p+{{e}^{-}}+\bar{v}$ (anti-neutrino)