A lithium nucleus contains 3 protons and 4 neutrons. What is its atomic number?
Correct answer: C. 3
- A. 1
- B. 7
- C. 3
- D. 4
- E. 12
Explanation
The atomic number (Z) is the number of protons in the nucleus of an atom i.e. 3 in the case of lithium.
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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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