The atomic nucleus does not contain:
Correct answer: B. Free electron
- A. Proton
- B. Free electron
- C. None of these
- D. Neutron
Explanation
The nucleus is a dense, positively charged region of an atom composed of protons and neutrons. The electrons revolve around the nucleus in three-dimensional orbits. It is depicted below and shows electrons, orbiting nucleus.
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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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