That is not a question. Think about what information you want, and rewrite the question.
Uranium-239 does NOT decay by alpha decay, it decays only by beta and gammadecay.
Uranium 238 is transformed in thorium 234 by alpha decay.
The end products of uranium isotopes decay chain are the isotopes of lead.
Only the end product of the decay chain of uranium, a non radioactive isotope of lead.
See the link below for radioactive decay chains.
Alpha decay
It is thorium 234.
Because the stable isotopes of lead are the end products of the decay chain of uranium natural radioactive isotopes. or because lead is the product of decayed uranium... that should be a good enough answer for your chem teacher you cheater!
The possible products of the alpha decay of uranium-238 are thorium-234 and helium-4. During alpha decay, the uranium nucleus releases an alpha particle (helium nucleus) and transforms into thorium-234.
The decay of a uranium-238 atom into lead-206 involves the emission of 8 alpha particles. This decay process releases 8 helium-4 (α) particles as the uranium nucleus undergoes multiple decay steps to stabilize as lead-206.
Yes, plutonium-239 emits alpha particles by decay.
Radium is a decay product of uranium.