Physics
The electron emitted in beta radiation originates from :
- outer orbit of the atom
- inner orbit of the atom
- free electron existing in the nucleus
- decay of the neutron in the nucleus
Answer
decay of the neutron in the nucleus
Reason — In beta radiation, the emitted electron does not come from the atomic orbits. Instead, it is produced inside the nucleus when a neutron undergoes decay, converting into a proton and emitting an electron (beta particle) along with an antineutrino.
Thus, the electron originates from a nuclear transformation, not from the electron shells of the atom.
Related Questions
The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter nucleus is :
- isotope of the parent
- isobar of the parent
- isotone of the parent
- None of the above
Assertion (A): Out of α, β and γ radiation, α-particles have maximum penetrating power.
Reason (R): The α-particles are the heaviest amongst the three.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Assertion (A): 146C and 147N are isobars.
Reason (R): 146C has 6 protons and 8 neutrons in its nucleus, whereas 147N has 7 protons and 7 neutrons in its nucleus.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.