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Protons and neutrons are subatomic particles that are found in the nucleus of an atom. The nucleus is the central part of an atom and is made up of protons and neutrons.Protons are positively charged particles and are found in the nucleus of an atom. The number of protons in the nucleus determines the atomic number of the element, and thus its identity. For example, all hydrogen atoms have one proton in their nucleus, while all helium atoms have two protons in their nucleus.Neutrons, on the other hand, are neutral particles and are also found in the nucleus of an atom. They are slightly heavier than protons and do not carry an electric charge. The number of neutrons in the nucleus of an atom determines the isotope of the element. Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons in their nuclei.The protons and neutrons in the nucleus are held together by the strong nuclear force, which is one of the four fundamental forces of nature. This force is responsible for holding the nucleus of an atom together, despite the fact that the protons repel each other due to their positive charges.In conclusion, protons and neutrons are subatomic particles that are found in the nucleus of an atom. The nucleus is the central part of an atom and is made up of protons and neutrons. Protons are positively charged particles, while neutrons are neutral particles. The number of protons in the nucleus determines the atomic number of the element and its identity, while the number of neutrons determines the isotope of the element. The protons and neutrons in the nucleus are held together by the strong nuclear force, which is one of the four fundamental forces of nature.