Beta particles are the particles emitted from the _ of an atom.
Correct answer: D. Nucleus
- A. Inner atomic shells
- B. Outer atomic shells
- C. Innermost atomic shell
- D. Nucleus
Explanation
The beta particle, which may be either negatively charged (negatrons) or positively charged (positrons), originates from the nucleus of an atom. A beta particle is emitted from the nucleus of an atom during radioactive decay. The electron, however, occupies regions outside the nucleus of an atom.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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