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Protons are positively charged subatomic particles that play a crucial role in the atomic structure. They are found within the atomic nucleus alongside neutrons, forming the core of an atom. Protons were discovered by Ernest Rutherford in 1919 and are now known to have a charge of +1. This positive charge is balanced by an equal number of negatively charged electrons orbiting the nucleus. One of the key features of protons is their stability. They are relatively stable particles with an incredibly long lifespan compared to other subatomic particles. Due to their positive charge, protons also play a vital role in the chemical properties of an atom, determining its identity and interactions with other atoms. In conclusion, protons are fundamental building blocks of matter that contribute to the structure and behavior of atoms. Their presence and properties are essential for understanding the nature of the physical world.