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 proton in the nucleus decays emitting an electron

Answer 1

The correct option is C A neutron in the nucleus decays emitting an electron

In a beta minus decay process, a neutron inside the nucleus converts into a proton and an electron are created.
${}_6^{14}C{\to }_6^{14}N+e^{-}$,
In the above example a neutron converted into a proton, thus the mass number wasn't altered but the atomic number was increased by one.