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

During a negative beta decay

(c) a neutron  in the nucleus decays emitting an electron

Reason:- In negative beta decay ,unstable nucleus decays an electron along with anti-neutrino.these anti-neutrino released is for energy conservation.And during these process neutron is converted into proton.

In negative beta decay the parent nucleus decays into daughter nuclei in which proton is more than 1 as compare to parent nuclei.

Answer 2

Explanation:

• During the decay of the negative beta, a neutron that is present in the nucleus decays with the electron emission.  

       This is shown by the equation,  

       $\mathrm{N} \rightarrow \mathrm{p}+\mathrm{e}-+\mathrm{v}^{-}$

• The decay of the neutron also produces electron, proton and anti-neutrino.
• Also, the decay of negative beta does not eject an atomic electron, does not emit electron and does not eject the electrons that are present in the nucleus already.