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Protons are one of the fundamental particles that make up the building blocks of matter. They are found in the nucleus of an atom, along with neutrons. Protons have a positive charge, which is balanced by the negative charge of electrons orbiting the nucleus. The number of protons in an atom determines its atomic number, which also dictates its chemical properties. For example, an atom with one proton is hydrogen, while an atom with six protons is carbon. One of the most intriguing aspects of protons is their ability to bind together in the nucleus through the strong nuclear force. This force overcomes the electrostatic repulsion between positively charged protons, allowing them to form stable nuclei. In addition to their role in atomic structure, protons are also used in various fields such as medicine (proton therapy for cancer treatment) and particle physics (collisions in particle accelerators). The power and versatility of protons make them indispensable in understanding the mysteries of the universe.