Monday, February 20, 2006
Definition: An elementary particle that is stable, bears a positive charge equal in magnitude to that of the electron and has a mass of 1.672614*10-27 kg, which is 1836.12 times that of the electron. The proton occurs in all atomic nuclei. The number of protons in a nucleous determines which element it is (the atomic number). A proton is a Baryon.