Assertion (A) : Radioactive nuclei emit beta- particles whose charge and rest mass are exactly same as that of electrons . Reason (R) : Electrons exists inside the nucleus .

Assertion (A) : Radioactive nuclei emit beta- particles whose charge a

1.	Assertion (A) : Radioactive nuclei emit beta- particles whose charge and rest mass are exactly same as that of electrons . Reason (R) : Electrons exists inside the nucleus .
Answer» Solution :ELECTRONS do not exist in nucleus . At the time of `beta` - decay , a NEUTRON is transformed into a PROTON and ELECTRON comes out as `beta`- PARTICLE.

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Assertion (A) : Radioactive nuclei emit beta- particles whose charge and rest mass are exactly same as that of electrons . Reason (R) : Electrons exists inside the nucleus .

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