Question

what is in a proton​

Answer 1

Proton is a positively charged 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". 

Answer 2

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"

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