Question

The following nuclear reaction what will be the atomic mass of the decay product after two alpha particles are emitted?

230/92 Th—>2 4/2 He +_______

Answer 1

We have a major problem here. 92 is not Th. It is U. To find the products you make the top numbers add up and the bottom numbers add up. It's that simple but I will start with U and not Th

230/92 Th—>2 4/2 He +_______

230/92 U ==> 4/2 He + 226/90 Th
226/90 Th ==> 4/2 He + 222/88Ra