A Physics [Quantum Theory] Problem... help please...
"An instable nucleus that was initially at rest decays into a nucleus of fermium-252 containing 100 protons and 152 neutrons and an alpha particle that has a kinetic energy of 8.42 MeV. The atomic masses of helium-4 and Fermium-252 are 4.00260 u and 252.0849 u"
I would like to know how to calculate
1. the atomic number of the original unstable nucleaus.
2. the Velocity of the alpha particle.
And could someone please explain to me breifly where does this KE of the alpha particle come from? I was a little bemused by that bit in my lesson.
And also, hypothetically, say the fermium-252 nucleus went through a decay which a Beta- particle was produced, how does this affect the atomic number of the nucleus? Please explain this to me. I was also confused by that.