The electron emitted in beta radiation originates from

Options

A. (a) inner orbits of atom
B. (b) free electrons existing in nuclei
C. (c) decay of a neutron in a nucleus
D. (d) photon escaping from the nucleus

Explanation

To solve the question, "The electron emitted in beta radiation originates from," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Beta Radiation**:
Beta radiation involves the emission of beta particles, which can be electrons (beta-minus decay) or positrons (beta-plus decay). In this case, we are focusing on beta-minus decay where electrons are emitted.

2. **Identifying the Source of Electrons**:
In beta-minus decay, an unstable neutron within the nucleus of an atom undergoes a transformation. This transformation is crucial to understand where the emitted electron comes from.

3. **Neutron Decay Process**:
During beta-minus decay, a neutron is converted into a proton. This process can be represented by the equation:
\[ n \rightarrow p + e^- + \bar{\nu} \]
Here, \( n \) is the neutron, \( p \) is the proton, \( e^- \) is the emitted electron (beta particle), and \( \bar{\nu} \) is the antineutrino.

4. **Conclusion**:
From the decay of the neutron, we see that the emitted electron originates from the transformation of the neutron into a proton. Therefore, the correct answer to the question is that the electron emitted in beta radiation originates from the decay of a neutron in the nucleus.

### Final Answer:
The electron emitted in beta radiation originates from the decay of a neutron in the nucleus.

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