Question #4553b

1 Answer
P dilip_k
May 26, 2016

""_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.

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