Question

The radius of the nucleus of an atom is approximately equal to _______

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Solution

Atomic nucleus:An atom is composed of three sub-atomic particles that are electrons, protons, and neutrons.The protons and neutrons reside inside the nucleus while the electrons revolve around it in circular orbits.An atomic nucleus is much, much smaller than an atom. The protons and neutrons in the nucleus are held together by strong nuclear forces and overcome the repulsions between protons.The diameter of an atom is about ${10}^{-10}\mathrm{m}$, whereas the diameter of the nucleus is roughly ${10}^{-15}\mathrm{m}$ which is about $100,000$ times smaller.Hence, the radius of the nucleus of an atom is approximately equal to ${10}^{-15}\mathrm{m}$.

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