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Protons are positively charged subatomic particles that are found within the atomic nucleus. Alongside neutrons, they make up the majority of the mass of an atom. The number of protons in an atom determines its atomic number and, therefore, its identity on the periodic table. Protons are essential for the stability of atomic nuclei, as they help keep the positively charged protons together through the strong force. Furthermore, protons play a key role in nuclear reactions and particle physics experiments. They are also crucial in determining the chemical properties of elements. Without the presence of protons, the universe as we know it would not exist. In conclusion, protons are fundamental building blocks of matter and hold a significant place in the world of physics. Their properties and interactions continue to be the subject of exploration and study in the scientific community.