text: """
  The `plasmapy.particles` subpackage provides access to information about
  atoms, isotopes, ions, and other particles.
  """
  __all__ = [
      "json_load_particle",
      "json_loads_particle",
      "AbstractParticle",
      "CustomParticle",
      "DimensionlessParticle",
      "Particle",
      "ParticleJSONDecoder",
  ]
  
  from plasmapy.particles.atomic import (
      atomic_number,
      common_isotopes,
      electric_charge,
      half_life,
      integer_charge,
      is_stable,
      isotopic_abundance,
      known_isotopes,
      mass_number,
      particle_mass,
      reduced_mass,
      stable_isotopes,
      standard_atomic_weight,
  )
  from plasmapy.particles.ionization_state import IonizationState, State
  from plasmapy.particles.ionization_states import IonizationStates
  from plasmapy.particles.nuclear import nuclear_binding_energy, nuclear_reaction_energy
  from plasmapy.particles.particle_class import (
      AbstractParticle,
      CustomParticle,
      DimensionlessParticle,
      Particle,
  )
  from plasmapy.particles.particle_input import particle_input
  from plasmapy.particles.serialization import (
      json_load_particle,
      json_loads_particle,
      ParticleJSONDecoder,
  )
  from plasmapy.particles.special_particles import ParticleZoo
  from plasmapy.particles.symbols import (
      atomic_symbol,
      element_name,
      ionic_symbol,
      isotope_symbol,
      particle_symbol,
  )
  
  # Create instances of the most commonly used particles
  
  proton = Particle("p+")
  electron = Particle("e-")
  neutron = Particle("n")
  positron = Particle("e+")
  deuteron = Particle("D 1+")
  triton = Particle("T 1+")
  alpha = Particle("He-4 2+")
  