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
  part:  atomic_theory
  type:  natural_science  the sciences involved in the study of the physical world and its phenomena

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