1.

For emission of alpha-particle from uranium nucleus: ._(92)U^(235) - ._(2)He^(4) rarr ._(90)Th^(231) Shortage of two electrons in thorium is due to

Answer»

CONVERSION of ELECTRON to positron
Adsorption in the nucleus
Annihilation
Combustion with POSITION to EVOLVE energy

Answer :C::D


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