Question

During a negative beta decay

• A. an atomic electron is ejected
• B. an electron which is already present within the nucleus is ejected
• C. a neutron in the nucleus decays emitting an electron
• D. a part of the binding energy of the nucleus is converted into an electron

Answer 1

Answer: (C)

a neutron in the nucleus decays emitting an electron

Answer 2

Following nuclear reaction takes place
$_0n^1\rightarrow_1H^1+_{-1}e^0+v$
v is antineutrino.