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Subject - General Chemistry
In substitution (from the Latin substituere) reactions
- one atom or a group of atoms in the molecule is replaced by other atoms or group of atoms (substituents),
- ligands at the central atom of coordination compounds are exchanged and
- atomic nuclei are replaced by other nuclei with identical atomic numbers but different mass numbers. These exchanges are called isotope substitutions and isotope effects.
Subject - general definition
In general, substitution is used to define the exchange of
- a concept
- a mathematical term
- an economic asset by other equivalent term
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