Radioactivity (uranium decay)?

Question

Uranium (92 protons) decays by emitting an alpha particle and two beta particles; which element is produced after those three decays?

Answer 1

I will assume you're referring to U-238, the most common isotope. The U-238 decay chain is



Uranium-238 alpha-decays to Thorium-234, which beta-minus-decays to Protactinium-234, which beta-minus-decays to Uranium-234.

Answer 2

uranium as Z = 92, A = 238 as its natural isotope, although 235 is found naturally as well, lets assume isotope 238

alpha particle is helium nucleus (2p, 2n) (Z = 2) Z is atomic number

beta decays converts a neutron into a proton and an electron and a neutrino (disregard the neutrino, as it is massless)

so we have total number of protons = 92 -2 (+1 +1) = 92

total atomic mass :238 -2 -1 -1 = 234

element will be Uranium - 234

Answer 3

If you are referring to U238 (?) (Z=92, N=238-92) then the alpha decay results in Z-2, N-2 and the two beta decays result in Z+2, N-2 giving rise to U234!