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  2. Proton - Wikipedia

    en.wikipedia.org/wiki/Proton

    A proton is a stable subatomic particle, symbol. p. , H +, or 1 H + with a positive electric charge of +1 e (elementary charge). Its mass is slightly less than the mass of a neutron and approximately 1836 times the mass of an electron (the proton-to-electron mass ratio). Protons and neutrons, each with a mass of approximately one atomic mass ...

  3. Nucleon - Wikipedia

    en.wikipedia.org/wiki/Nucleon

    In physics and chemistry, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus. The number of nucleons in a nucleus defines the atom's mass number (nucleon number). Until the 1960s, nucleons were thought to be elementary particles, not made up of smaller parts.

  4. Quark - Wikipedia

    en.wikipedia.org/wiki/Quark

    Quark - Wikipedia ... Quark

  5. Atomic nucleus - Wikipedia

    en.wikipedia.org/wiki/Atomic_nucleus

    Atomic nucleus - Wikipedia ... Atomic nucleus

  6. Atomic number - Wikipedia

    en.wikipedia.org/wiki/Atomic_number

    Atomic number - Wikipedia ... Atomic number

  7. Atomic units - Wikipedia

    en.wikipedia.org/wiki/Atomic_units

    Atomic units - Wikipedia ... Atomic units

  8. g-factor (physics) - Wikipedia

    en.wikipedia.org/wiki/G-factor_(physics)

    g-factor (physics)

  9. Particle physics - Wikipedia

    en.wikipedia.org/wiki/Particle_physics

    Particle physics