Question

Question #4553b

Answer 1

`""_92^238U` atom when disintegrates emitting 3 `alpha` particles it is trasfomed into `""_86^226Rn` atom which after disintegrating 2 `beta` particles turns to `""_88^226Ra`

Explanation:

Each `alpha` particle has 4 unit mass and 2 unit positive charge.So after emission of 3 `alpha` particles the `"_92^238U` turns into new element having mass no.`238-3*4=226` and atomic no.`92-3*2=86`.The new atom formed is Radon(Rn).

Each `beta` particle has negligible mass but one unit negative charge.Rn atom gains two unit nuclear charge and gets transformed into Ra of mass no.226 and atomic no.88.when 2 `beta` particles are emitted from its nucleus.