Hint: At the time of emanation of a beta molecule (electron), a neutron in the nucleus is changed into a proton. Another molecule called against neutrino (⊽) begins, which has zero mass and charge. Hence, during beta discharge, the nuclear number increments by one, and the mass number remaining parts unaltered .
Complete step by step answer: Question lies in the idea of high energy physical science. Beta decay is a pitifully collaborating measure in which one of the neutrons gets changed over into a Proton with emanation of an electron. As we probably are aware, the quark substance of neutrons is 'udd' and for protons is 'uud'. In beta decay, one of the 'down' quark gets changed over to an 'up' quark with the emanation of a w- boson, which quickly decay to an electron and an antineutrino. Something intriguing here is that the radiated electron can't be named as an ordinary electron. The produced electron is otherwise called a beta molecule which has energy in the request for MeV, yet it has a few properties same as a circling electron. Beta decay is a sort of radioactive rot wherein a neutron is changed into a proton, or a proton is changed into a neutron inside the nucleus of a molecule. At the point when a neutron is changed into a proton, the quantity of protons in the nucleus increments. Since nuclear number is the quantity of protons in the nucleus, an increment in the quantity of protons causes an increment in nuclear number.
Note: In beta decay, one of the neutrons in the nucleus abruptly changes into a proton, causing an expansion in the nuclear number of an element. That implies that a response that changes the quantity of protons in the nucleus changes what component we really believe the nucleus to be.