مممممممممممممممممممم بنبحث ف الموضوع ... سؤال ..وش هذا Beta particle ؟!_ ..اول مرة اسمعبه _

هذا احد الحلول القريبه .. An atomic nucleus emits an electron whose speed is very close to the speed of light. As atomic nuclei contain no particles besides protons and neutrons, a transformation of particles is the only explanation for this process. A neutron of the original nucleus turns into a proton, an electron and an anti-electron-neutrino. The mass number (nucleon number) of the emitting nucleus remains constant while the atomic number (proton number) increases by 1.

وبعد هذا ممكن يفيدك ..

N = neutron number
Z = atomic number = # of protons
A = atomic mass number = Z + N

trueprober and Madhukar are right, but they both neglected to mention that beta radiation comes in two forms: β- (an electron) and β+ (a positron); and they have opposite effects on the atomic number, Z.

As they both say, a β˜ decay converts a n⁰ to a p+:
. . . . . . . . . . . . _
n⁰ → [p+] + e˜ + ν

"nu-bar" being an antineutrino; it and the electron both escape, leaving A=Z+N unchanged, while increasing Z by 1 and decreasing N by 1.

But when it's β+ decay, the conversion in the nucleus is from a p+ into a n⁰:
p+ → n⁰ + [e+] + ν

the neutrino and the positron both escape, leaving A=Z+N unchanged, while decreasing Z by 1 and increasing N by 1.

سوري هذا الي اقدر عليه ..وشكرا ..موفقه

شمشوم يفيدك !....

So , what is the problem ??

Beta particle which is electron

this electon is not from electrons that around neucles
its from neutrons that is inside neuclus

boz neutron = electron+ proton in charge

and when nutron lose electron it will change to proton

that means atomic mass constant
and atomic nub increase by 1

( consentrate to red color)