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Chapter 19: Problem 11

The electron emitted in beta radiation originates from (A) Inner orbits of atoms. (B) Free electrons existing in nuclei. (C) Decay of neutron in a nucleus. (D) Photon escaping from the nucleus.

Short Answer

Expert verified
The electron emitted in beta radiation originates from the decay of a neutron in a nucleus (C). During this process, a neutron is converted into a proton, and an electron (called a beta particle) is emitted.

Step by step solution

01

Option A: Inner orbits of atoms

Electrons in the inner orbits of atoms are not involved in beta radiation. Beta radiation occurs within the nucleus of an atom and not the electron orbitals. Therefore, this option is incorrect.
02

Option B: Free electrons existing in nuclei

Although it is true that an electron is emitted during beta radiation, the electron does not originate as a free electron existing in the nucleus. Instead, it is created during the decay process. So, this option is not correct.
03

Option C: Decay of neutron in a nucleus

Beta radiation involves the conversion of a neutron into a proton within the nucleus of an atom. During this process, an electron (called a beta particle) is emitted. This description matches the origin of the electron in beta radiation; thus, this option is correct.
04

Option D: Photon escaping from the nucleus

Photons are particles of light and are not associated with beta radiation. The emission of a photon from the nucleus is related to gamma radiation, not beta radiation. Therefore, this option is incorrect. Based on the analysis of the options, the correct answer is: (C) Decay of neutron in a nucleus.

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