Question

HELP!! Radioactive decay problems

Answer 1

It is artificial transmutation process.
mass of Uranium = Mass of He + Mass of x
mass of x = 234-4
mass of x=230

Atomic no.(nuclear charge of Uranium) = Atomic No. of He + Atomic No. of x
So , atomic no. of x = 92-2
= 90

So x has atomic no. 90 and atomic mass 230u.
so, we can find that x is Thorium.