Question

Q1.The nucleus does not contain electrons but how does it emit beta particles?

Answer 1

HERE'S UR ANSWER___

In Radioactive emissions of Beta particles, a bound neutrone in the nucleus changes into a Proton inside the nucleus, with the emission of an electron and an anti-nutrieno.

Since mass of a free neutron is more than that of a free proton, a free neutron also decays in a similar fashion, I.e. into a proton, electron and anti-neutrino.

A bound Proton also changes into neutron with the emission of the positron, and a neutrino. It needs to be emphasized that only a bound Proton inside the nucleus, undergoes this conversion, i.e into a neutron, a positron and a neutrino.

So although electrons are not present in the nucleus, these are spontaneously created at the time of decay and are emitted.

HOPE THIS HELPS___
Mark as Brillianist____
:-))

Answer 2

Inside the nucleus one neutron changes into one proton and one electron. The electrons come out causing β-emission & proton remains inside the nucleus.