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Protons are subatomic particles that are found within the nucleus of every atom. They have a positive charge, which balances out the negative charge of electrons that orbit the nucleus. The number of protons in an atom determines its atomic number, which in turn defines the element's identity. For example, all atoms with one proton are hydrogen atoms, while atoms with six protons are carbon atoms. Protons are essential for the stability and structure of atoms. They are held together in the nucleus by the strong force, which overcomes the electromagnetic repulsion between positively charged particles. Without protons, atoms would not exist in their current form, and the entire universe would be drastically different. In addition to their role in atomic structure, protons also play a crucial role in particle physics. They are used in particle accelerators to generate high-energy collisions that can produce new particles and explore the fundamental forces of the universe. Overall, protons are the building blocks of matter and are essential for understanding the world at the most basic level.