Individual #chemistry__chemical_science  the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
  >part:  #immunochemistry  #organic_chemistry  #inorganic_chemistry  #physical_chemistry  #electrochemistry  #geochemistry  #photochemistry  #radiochemistry
  instance of:  #natural_science
  part:  #atomic_theory  a theory in which matter consists of atoms

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