what is proton?explain.
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One of the three types of particles that form all atoms. Protons have a positive electric charge.
A proton is a subatomic particle, symbol
p or p+ with a positive electric charge of +1e elementary charge and a mass slightly less than that of a neutron. Protons and neutrons, each with masses of approximately one atomic mass unit, are collectively referred to as "nucleons".
Observed as H+ by Eugen Goldstein (1886). Identified in other nuclei (and named) by Ernest Rutherford (1917–1920).
1.672621898(21)×10−27 kg
938.2720813(58) MeV/c2
1.007276466879(91) u
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