The unstable atom means:
Correct answer: D. Any of these
- A. Electrons are increasing
- B. Protons are increasing
- C. Neutrons are increasing
- D. Any of these
Explanation
Multi electronic species are unstable, it prefers to lose electrons and form a stable octet or duplet; a "higher proton and neutron" number means a heavier nucleus which is naturally radioactive, i.e. naturally unstable. An unstable atom also has excess internal energy, with the result that the nucleus can undergo a spontaneous change (change in the number of protons and/or neutrons) towards a more stable form.
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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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