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Protons are subatomic particles that are found within the nucleus of atoms. They have a positive electrical charge and are crucial for the stability of atoms. Along with neutrons, protons make up the nucleus of an atom, while electrons orbit around the nucleus. The number of protons in an atom determines its atomic number, which in turn defines the element. For example, hydrogen has one proton, while carbon has six protons. Protons also contribute to the mass of an atom, as they are relatively heavy compared to electrons. Protons are held together in the nucleus by strong nuclear force, which overcomes the electrostatic repulsion between positively charged protons. This force is one of the four fundamental forces in nature, along with gravity, electromagnetism, and the weak nuclear force. In conclusion, protons are essential building blocks of matter, playing a significant role in the structure and behavior of atoms. Their properties and interactions are key to understanding the foundation of our universe.