adjective
- having a valence of seven; capable of combining with seven atoms of hydrogen or their equivalent
Usage: chemistry; technical
Examples
- Manganese can exhibit a heptavalent state in certain compounds.
- The heptavalent form of chlorine is rare but theoretically possible.
- In the heptavalent oxidation state, the element has lost seven electrons.
- Some transition metals display heptavalent behavior under extreme conditions.