Why are neutrons present in the nucleus only?

Question

why is it not present anywhere else.

Answer 1

Electrons, as we know, are negatively charged particles and protons are positively charged....
So it needs a neutral particle in it so that it remains neutral..............
.therefore, a neutron is always present in a nucleus(as neutron is a neutral substance)..............


I've explained it in simplest of words I could get so that nobody gets confused..............

Answer 2

Note that if a large nucleus decays by emitting an a , the nucleus left behind has an even greater ratio of neutrons to protons, since a = 2p+2n. This implies that it might be able to go to a lower energy state if it could trade a neutron for a proton. In fact, this can sometimes be done. The neutron itself is not a stable particle. A neutron alone in space will only last about ten minutes before ejecting an electron, leaving a proton behind. This is energetically possible, because the mass of the neutron exceeds the sum of the masses of the proton and electron. The process is called b -decay. It can also occur in a nucleus, but now the different binding energies of the initial neutron and the final proton must be factored in to decide if it will go. Other things being equal, the more neutrons there are present in the nucleus, the more likely it is to b -decay. Actually, b -decay was a big puzzle when it was first carefully observed, because it was discovered that identical nuclei b -decaying to the same final states ejected electrons over a range of energies, up to a maximum corresponding to the energy difference between the initial and final nuclei. This led to the suggestion that maybe, after all, energy wasn’t conserved in every process in nature

Answer 3

then nucleus contains neutrons and protons theyre known as nucleons

Answer 4

Because everywhere else has protons and electrons. You gotta balance stuff out.