Proton
What is Proton?
A proton is a subatomic particle in the atomic nucleus with a positive elementary charge (+1.602×10⁻¹⁹ C) and a mass of approximately 1.673×10⁻²⁷ kg (1 amu). The atomic number (Z) equals the number of protons; it defines the element. In acid–base chemistry, a proton is synonymous with a hydrogen ion (H⁺). Protons are used as projectiles in particle accelerators to probe nuclear structure.
Key Facts
Frequently Asked Questions
A proton is a subatomic particle in the atomic nucleus with a positive elementary charge (+1.602×10⁻¹⁹ C) and a mass of approximately 1.673×10⁻²⁷ kg (1 amu). The atomic number (Z) equals the number of protons; it defines the element. In acid–base chemistry, a proton is synonymous with a hydrogen ion (H⁺). Protons are used as projectiles in particle accelerators to probe nuclear structure.