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the transfer of energy through a material.
the separation of a dye into the different colours that make up that dye, as a result of the...
an atom or group of atoms that replaces a hydrogen atom in an organic compound.
the energy released when a nucleus is formed from its component particles.
a group of organic compounds that can be represented by a general formula e.g. alkanes, alcohols...
the introduction of halogen atoms into a compound by addition or substitution.