At a simple level, a neutron is decaying to give a proton and an electron. No contradiction here
umum...one more question
Al + β
No. of electrons in Si is 14, and that in Al is 13
so, is that the β should come from Si ?
and the proton is just "converted" to a neutron, instead of giving out a neutron and electron?
btw, just interested to know, why the proton will convert to a neutron instead of forming a positively charged Al?