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Protons are one of the fundamental building blocks of matter, along with neutrons and electrons. They have a positive electric charge and are tightly bound within the nucleus of an atom. The number of protons in an atom determines its atomic number, which in turn defines its chemical properties. In recent years, protons have gained attention in the field of medical treatment. Proton therapy is a type of radiation treatment that uses high-energy protons to target cancer cells with greater precision and minimal damage to surrounding healthy tissue. This therapy is particularly beneficial for treating tumors in sensitive areas such as the brain, spine, and eyes. Furthermore, protons are also used in particle accelerators for research in particle physics, nuclear physics, and material science. Their unique properties make them valuable tools for studying the inner workings of atoms and understanding the fundamental forces of nature. In conclusion, protons are essential components of matter with diverse applications in science and technology. Their potential for advancing research and improving medical treatments makes them a powerful and promising subatomic particle.