Question

in the radioactive decay series beginning with 238U, the first three steps are: (1) alpha emission, (2) Bemission, (3) emission What is the atomic number of the nucleus that exists after these first three decay steps?

Answer 1

First we have to know what is alpha and beta minus emission

beta minus emission: A neutron is converted into a proton, and the process create a electron and an electron anti neutrino.

alpha emission: alpha decay emmits the alpha particles(helium nucleus) with mass no. that is reduced by 4 and atomic no. reduced by 2.

Please find the attached image for the 3 decay process:

92 is the atomic no. which we get after the 3 decay process, i.e., Uranium

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