Which particle in an atom has a positive charge?

The particle in an atom that possesses a positive charge is the proton. Protons are found within the nucleus of the atom, playing a crucial role in defining the element's identity. Each element on the periodic table is characterized by the number of protons in its nucleus; for example, hydrogen has one proton, while carbon has six. The positive charge of protons is essential because it balances the negative charge of electrons, ensuring the atom is electrically neutral overall when the number of protons equals the number of electrons. This fundamental property contributes to the structure of the atom and affects how it interacts with other atoms and molecules in various chemical reactions.