The protons in the nucleus of an atom DO NOT exit due to
Correct answer: D. Strong nuclear force
- A. Electromagnetic force
- B. Gravitational force
- C. Weak nuclear force
- D. Strong nuclear force
Explanation
The strong nuclear force acts over only a few femtometres but far exceeds the electrostatic repulsion between protons at that range, so it is what holds the nucleus together. The electromagnetic force pushes the protons apart and would blow the nucleus open on its own. Gravity is utterly negligible at nuclear scale and the weak force governs beta decay rather than binding.
This question appeared on the UHS MDCAT 2025 paper, which you can sit online with every answer explained.
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About Composition of Atomic Nuclei
Atomic nuclei contain positively charged protons and electrically neutral neutrons, collectively called nucleons. Questions use atomic number, mass number and nuclear notation to identify isotopes, isobars and isotones, and may connect nuclear composition with nuclear charge, mass defect, binding energy and the stability of the nucleus.
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