Primary
organic chemistry:
- Primary : functional group attatched to carbon atom connected to 1 or no other Carbon atoms
- Secondary: functional group attatched to carbon atom connected to 2 other Carbon atoms
- Tertiary: functional group attatched to carbon atom connected to 3 other Carbon atoms
- Quaternary: functional group (or usually ion) attatched to carbon atom connected to 4 other Carbon atoms
- In physics, the term primary can refer to the most massive component of a gravitationally bound system: see satellite.
- Primary is sometimes short for primary election.
- A movie: Primary (movie)
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